Market Dynamics: The current oversupply of (STRs) in some markets is better understood as a market correction rather than a sign of impending collapse.

You couldn't buy fractional shares, house prices were running, **** San Jose after the tech collapse looks a lot like today after the tech job cuts.

However, the neighboring building is about 20 feet longer than my building so there are about 20 feet where the building next door extends past my building.The building next to me is a vacant, bank-owned property that the DOB has declared an unsafe building due to a roof collapse in the back.

It's really not a hedge against the dollar collapsing, it's just your assets working for you to produce more $. 

Many deals have seen NOI collapse due to falling rents and rising costs.

What if you have a few major repairs (i.e HVAC collapse, flooding) ?

If you're going to be completely wrecked if the market collapses then look for something else.

Sure, but it will be unstable and collapse.

Default rates through 2024, barring a catastrophic collapse in valuations, will stay low since most homes have positive equity.

And most are not ponzi schemes.Per the SEC and FINRA, some typical signs of a Ponzi scheme are promises of outsized returns (which is necessary to have a Ponzi scheme function since it needs a constant flow of new investors to avoid collapse), promises of impossible things like guaranteed returns and/or failure to disclose the true risk of an investment (to make the claimed high returns seem more plausible), etc.