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Underwriting, with the math showing.

Deal metrics, BRRRR mechanics, and honest looks at the tools investors actually use — every claim traceable, every formula named.

August 8, 2026

How to calculate ARV — and why the appraiser gets the last word

After-repair value decides your offer price, your refinance, and how much cash you leave buried in a BRRRR deal — yet most guides hand you a formula that isn't really a formula. Here's the comp method appraisers actually use, a worked example, and how to protect the deal when the appraisal comes in low.

August 8, 2026

NOI vs. cash flow: two numbers, two jobs — and the expensive mistake of swapping them

Net operating income and cash flow get used interchangeably in listing copy and forum posts, but they answer different questions — one values the property, the other pays your bills. Here's the clean definition of each, a worked example where a healthy NOI produces zero cash flow, and which metric needs which number.

August 8, 2026

The rental property analysis spreadsheet: where it works, where it quietly breaks

Most investors underwrite their first deals in Excel, and that instinct is right. But audits of real-world spreadsheets find errors in nearly all of them. An honest comparison of the spreadsheet and the purpose-built analyzer — and when each one wins.