Before You Underwrite the Deal, Establish What Is True

A buyer is mid-diligence on a park with a second operating business on site. The income will not reconcile to anything on paper, and nobody in the room is surprised.

The scenes in this opening are illustrative composites, not documented cases.

An experienced operator, asked where the chaos in a deal really comes from, does not point at the numbers. He points at the process. The same root cause shows up in deal after deal: no single verifiable source of truth. Everything downstream, the underwriting, the negotiation, the close, depends on that foundation. Most deals never build it.

Sellers sometimes say the financials understate the real revenue, that they actually make more. The cash collections and the separate ledgers behind that claim never quite materialize for review.

Stories like these are, in our judgment, the normal texture of buying an RV park or a manufactured housing community. Every deal arrives as a stack of claims dressed as facts, and the buyer's real job, before any valuation math happens, is to sort them.

The broker package is a stack of claims

The offering memorandum reads like a record. It is not a record. It is a sales document assembled from whatever the seller provided, whatever the broker chose to include, and whatever assumptions filled the gaps. The rent roll, the profit and loss statement, the occupancy figures, the utility summaries: each one is a claim about the property, and each one deserves the same treatment a serious buyer gives any claim. Verify it, or label it honestly.

Many buyers skip this step, in our judgment. They underwrite the story. They take the package at face value, run the numbers, and build an investment case on a foundation nobody checked. Sometimes it works out. When it does not, the failure is rarely dramatic. It is a slow bleed: collections that never matched the rent roll, expenses the P&L rounded away, occupancy that counted heads instead of dollars. The deal looked fine on paper because the paper was never questioned.

Serious buyers do something different. They verify the record.

The six labels

Every number in a deal is one of six things. Labeling them is the whole discipline.

Editor's note (2026-10-05): this note was written when the public language used four evidence states. The ParkProof Standard now uses six: Verified, Broker-reported, Missing evidence, Underwriting assumption, Calculated, and Unresolved.

Verified. The number is supported by identified evidence and has been through human review. A rent roll line tied to a lease, a bank deposit, or a signed estoppel is verified. The evidence is named, and someone looked at it.

Broker-reported. The number appears in the offering memorandum, on a call, or somewhere in the package, and it has not been independently verified yet. Most of the package lives here on day one. That is fine. It is only a problem if it stays here unlabeled.

Missing evidence. The information is material, and it has not been received, not been located, or is not sufficient for review. The seller who says the real revenue is higher but cannot produce the ledgers: that revenue is missing evidence. Name the gap instead of pricing around it.

Underwriting assumption. The number is a stated input to the investment case, not a fact. A projected rent increase, an assumed expense ratio, a stabilized occupancy target: all legitimate, all assumptions. An assumption is fine to carry. It is only dangerous when it is unlabeled and priced as a fact.

Calculated. The system computed it from verified inputs. A cap rate derived from verified NOI and verified purchase price is calculated, not assumed. The math is deterministic. The inputs are what matter. A calculated figure should also be reproducible and versioned: another reviewer, given the same stated inputs and the same version of the calculation, should land on the same number. If the inputs or the version change, the figure is recalculated and relabeled, not carried forward on trust.

Unresolved. It has been looked at, but the evidence cannot be determined yet. Not missing, not unknown, just stuck. Name it as unresolved so it does not get priced as a fact or buried as an unknown.

The six evidence states (the CrosstownOS ParkProof Standard):

Run two numbers through the labels and the discipline becomes concrete. Take an illustrative case: a rent roll shows $42,000 in monthly collections. The bank statements show $38,500 in deposits. The $42,000 is broker-reported. The $38,500 is verified. The $3,500 gap is missing evidence until someone explains it, and any underwriting that uses the $42,000 is carrying an assumption, whether the model admits it or not.

An illustrative occupancy figure of 92 percent counts every occupied pad. But three of those pads are employee units, two are comps, and one has not paid in four months. The 92 percent is broker-reported. The paying occupancy, the number that actually matters to the investment case, is lower, and the difference is a set of facts waiting to be verified or assumptions waiting to be labeled.

The discipline the labels enforce

The labels do not slow a deal down. They speed up the right parts of it. Once every material number carries a label, three things get easier.

First, the diligence list writes itself. Everything broker-reported needs a verification path. Everything missing evidence needs a request. The labels turn a vague feeling of unease into a specific list of items with owners and deadlines.

Second, the negotiation gets honest. A retrade is not an adversarial move when it follows from labeled evidence. It is the natural consequence of the record. Terms follow the same rule: The Offer Term-Sheet Builder builds your terms from the labeled record, before the broker builds them for you. Sellers respect buyers who can point at the gap between the claim and the evidence. A documented gap is hard to argue with, in our judgment, because the argument is then about the record, not about either party.

Third, the walk-away decision gets clean. The signal to walk is rarely one tenant behind on rent. It is a pattern: verbal agreements and side deals where the seller's story and the paperwork diverge, repeatedly, across the file. Labeled evidence makes the pattern visible early, before the earnest money is at risk.

What this blog will do

This is the first field note, and it is the foundation for everything after it. The method above, label every number, verify what matters, is the lens this blog will apply to each layer of a deal, one verification at a time.

Next, we start with the rent roll: a document buyers, in our judgment, often trust readily and verify late. After that, occupancy, utilities, infrastructure, and the rest of the file, each one worked through the same six labels.

Before you underwrite the deal, establish what is true. Everything else follows from that.

Capital committed against established facts does not need defending later. Capital committed against claims does.

Sources and Limits

Provenance matters for this note in particular, so it is stated plainly. The six label system in this note is CrosstownOS's own defined framework, defined at the ParkProof Standard. It is not an industry standard and is not presented as one. The behavioral claims in this note, about how buyers and sellers tend to act in a deal, are the author's judgment, drawn from the Acquisition Signal research program and from operator community research, anonymized so no park, seller, or commenter is identified. They are presented as judgment, not as measured findings. The opening scenes are illustrative composites, labeled as such where they appear.

External source opened for this note:

• Mobile Home University, The Truth About Mobile Home Park Due Diligence: an independent operator education source whose stated doctrine is the same verification practice this note argues for, making sure the assumptions used in the initial profitability calculations are true, verifying the P&L, the bills, the occupancy, and the permits, rather than trusting the information the seller provided.

Put it to work: start with the free RV park due diligence checklist for the fifteen items in order. When the deal gets real, the Acquisition Workspace carries the full record, every claim with its evidence state.

This note may use AI-assisted research and drafting. Sources, claims, and final editorial judgment remain subject to human review.