But if you want to set up some “tiny house vacation home” then it’s probably more “fun” than a strict “investment”.

With dogs, if they  have a tiny dog, tiny dogs BARK, and BARK.. and BARK... ( my irresponsible sister has 2 chiwawas (sp), I think to date she's been kicked out from 3-4 apartments because of their barking)... also, because they are tiny dogs, people often leave them out and do pee-pads... which is great, if they are perfectly trained.. most aren't, so if you have carpet... expect to replace it. 

Is that an estimate for a tiny house?

The tiny down payment and the ability to live in a great area make it worth it.

I painted every inch inside and out, fixed a million tiny small things, no major fixes.

Some research on the forum leads me to believe that these are good contenders - PARC property group, Alpine Capital Solutions, Pinnacle Investment Properties, FS Houses. 

$20,000,000 acquisition price70/30 loan$6,000,000 down payment$14,000,000 loan @ 5% amortized over 25 years$100,000 investment1.66% shareYear 1:NOI: $1,000,000Mortgage Interest: $680,000 (from calculator)Depreciation: $400,000 (($20M * 0.6) / 30)K-1 Taxable Income: -$80,000My Share: -$1,328Is that even a tiny bit accurate (even given fake numbers) or, if not, is it obvious what fundamental thing I'm still missing?

They want to work with people who have the funds and not potential flakes who are trying some way off the wall transaction and structure that has an extremely tiny chance of every happening.If a broker/agent runs an efficient business model of transaction after transaction then that type of buyer working on a long shot is not their ideal client.

So we’ve got a tiny yard and we are in a cash position to possibly try to acquire our neighbors’ lot without needing a loan.

THAT is the magic number.Imagine you have wreck. small tiny little shack in the most expensive area of the state.