However, I think a potentially serious logic error make be in the Wholesaling Calculator (which is needed and should be maintained).For example a rental wholesale can be measure by any one of the following:- Cash-on-Cash (cash purchase)- Cash-on-Cash (loan purchase)  **note: I have not figured out a logical approach to this one yet- Cap Rate-with-Purchase (NOI, 50%-Rule for expenses, and market rent [cash purchase])- Cap Rate-with-Loan (NOI, 50%-Rule for expenses, market rent, Cap Rate, and debt coverage [leveraged purchase])I have a rudely designed spreadsheet to do all three (3).

The other concern I have with metrics is the estimated hold backs, repair costs, CapEX improvements, turn over, etc.  

Tenant B is needing more space and renovations or they intend to leave as well.Tenant A hanging around is going to make it difficult for me to plan and perform expansions and improvements for Tenant B.

Would love to get some feedback on these numbers.FACTSFully occupied 3-unit MFH: 3 x 1br 1baAsking price $149kGross rent (not verified, based on the median rent in the area according to Rentometer): $2400/monthTenants pay all utilitiesAnnual taxes: $3,578.26; no unknown unpaid taxes nor liensNo HoA feesAnnual insurance (guestimate): $8002% rule: 1.66%50% rule: $646/month Calculations made with the current asking price, no rehab costs, $5k closing cost.

Generally I use 50bps (0.005) of purchase price as a general rule of thumb for annual premium. 

I think you're both right and I can get through it so long as I show that I'm playing by the rules and have a plan. 

I am trying to evaluate a potential project and I have positive cash flow, however when I look at 50% rule it's negative.

I am not super savvy on the rules of lending so I am sorry if my question proposes something against lending regulation. 

Under the rules of Prop. 13, the Office of the County Assessor appraises new construction at fair market value when the improvements are complete, and the value of the new construction is added to the total assessed value of the property."

Make sure you are up to date on Columbus short term rental local rules.