And only a tiny fraction has been through more than one recession. 

I'm currently converting an old short school bus into a beautiful tiny home on wheels which has been keeping me very busy!

I'm sure it's happened many times over (and will continue to happen) that someone owes pennies in taxes relative to the value of the subjective property and the state takes it back over a tiny amount of unpaid property taxes. 

If someone is going to cry about their ROI% on 1 rental property over a tiny 3 year window, it shows that they have a fundamental lack of understanding of how the rental property business works.When cap rate and ROI estimates are provided,  that is a general indication of the how the average of properties in that asset class will perform over time.At any tiny window with 1 small sample size you can greatly outperform and underperform.

Then the structural engineering, any requirements such as solar, fire sprinklers, that is required  per code, and possibly  earthquake standards, (depending on location), and all the sudden that circular tiny home is a million dollar project.  

Pulling relatively tiny amounts of equity from numerous properties to fund another deal feels like a bad idea.

You’d have to have a report of a certain type of housing, in a certain tiny neighborhood, priced by the SF.

I’ve been making tiny loans up there for years.

The property might be a candidate for a lot split, or the addition of a mother-in-law unit, or tiny home parking. 

@John Hickey It is a fascinating proposal; however, BP is basically like a tiny America [1.5M strong], right?