All the trade websites say that in the end they're only a tiny percentage more expensive than regular concrete block because the labor costs go way down.    

Starting to dream about building a trendy tiny home /  container home community in our local mountain town that has become insanely unaffordable to the  locals.

Don't rush the process for the sake of quantity.

Yes the leaseback will cover the loan and fees for the duration…if we don’t break even, we may have a tiny cash flow.the builder is using it as a model until they sell the remaining units they will build over the next couple years.

These properties will appeal to certain renters but it's going to be a tiny minority and you'll have plenty of competition for that limited demand.

We have a rural lake house, but it is on a paved road in a tiny little lake town.

However, generally I think that high cashflow/low appreciation markets only make sense when you are working with really large quantities of capital.

Standalone brick and mortars like compass are the ones that are burning through money and taking it from the agent and customerBH is not really publicly traded....sure the big conglomerate is, but the real estate piece is a tiny portion of this company. 

There are a TON of tiny/small towns in MN where $70k will buy you a house outright that will definitely cash flow.

Probably right, aiming for 1000 sqft livable space so not super tiny but still your point probably holds.