Mostly because it's set up to exclude things like mortgage principal payments and generally how it deals with capital expenses and deprecation. 

Also the stairs could be a deal breaker if you are in a retirement community your intended renter is a senior. 

Due diligence ends on Tuesday, and the seller has indicated no negotiation or repairs will be made.I have a walkthrough with my contractor on Sunday, but I'm trying to determine whether what I know is enough to decide whether to purchase or withdraw from the deal.

With current US interest rates, I'm not sure it's that easy to find 12.5% ROE deals in the US in the new normal.

You are more likely to be struck by lightning twice.

Its laid out so you can easily analyze deals on the fly and see your actual returns.

What's the deal here?

How accurate is the data provided by AirDND in terms of price and occupancy or do you use a different website to analyze deals?

Be sure to include state taxes in your deal analysis. 

Thus, I ensure to vet the deal to forecast the best (or worst) possible outcome for the borrower and a private money lender.