If the property is now worth $150,000, your mortgage is about $75,000 based on your $403 payment , meaning you are earning this $700 cash flow on equity of about $75,000; very poor ROE.

Comparing that to the rate you're getting from your Christmas Club saving account is ridiculous.Also now you seem to be confusing cap rates with ROE or whatever... you said, "that the amount that tenants pay, minus expenses, DOES represent the investors "interest rate" (when annualized and divided from their initial outlay )You DO understand cap rate, right?".   

While your ROI will not change with the market, the ROE will.  

We had a client at my previous firm that came in and filed bankruptcy and the time stamp on the filing was 3 minutes before the sheriff sale was conducted and the judge overturned the sale.

I'm interested in a tool that builds on the numbers I used above and Cap Rates, COC, ROI and ROE. 

Yes larger properties to a point are less work on a per unit basis but usually the yield is lower/ROE as unit count increases.

if not, that may quickly sink the deal.Assuming you have factored in property management, In terms of your financial evaluation, my gut is that there is something wrong in your ROE calculation.  

So far what ive see is that the ROE for rentals (short or long) is not very good but people tells me that you will earn a lot more renting on AirBnb.

Discovered my (now) paid off (now) $500k apt building is worth much more than having put $25k in a REIT back in '03, but.... now my ROE is getting rocked 7% vs 12%.If using leverage in your example, RE will beat you, especially if you count beta and risk for your futures and derivatives

The claim is overturned by the company.