well any pay 20k to a guru for that business model.. :)

I borrowed an underwriting model from a Real Estate Private Equity professional and it seems a little too complicated for what I am doing now and what I plan to do in the future.

It's a good idea to fund the "model home" if you plan on doing the "let me build your dream home" method, that way there is something to showcase instead of just plans and land.

Too few details to answer (Of course this varies county by county, all questions could be answered by reading the (zoning)/building code and/or clarified with a visit to the county planning office).but some clarifications because: lots of things are "tiny homes" but what you describe small houses "on permanent foundations" needs to be clarified , tiny homes could be:-stick built, see below. check your county code/planning dept-stick built cabins/recreational, a specific zoning and potential occupancy/etc restrictions but worth looking into where the zoning allows for it -hud manufactured homes (smaller singlewide perhaps 400sq ft 600sq ft minimum)-non-hud park models (on axles), ansi standards- other "RV's" built on a chassis:  organizations, state agencies, etc - will certify factory built (or sometimes inspected professional built) tiny homes on chassis - to whatever standards ansi, riva, dot/ l&i?

It's a fine business model as long as you don't mind your tenants paying fees for your use of the software. 

One time deal is not always a great business model. 

What it cannot do is look at an asset and model the risk that is involved.

. :) Having the insights that I do on this landscape, I'd recommend checking out Lead Sherpa and you can determine on your own how it matches up.For one, our model is all inclusive.

If the tenant responds that the problem still isn't resolved, then the system asks them to send a picture of the label with model and serial number.

Buying from a distance is certainly challenging but don't hold this experience against the entire turnkey model.