That's a sobering circumstance to contemplate, one not often mentioned by high-profile leaders of electric car makers."

Inherently permanent structures are any distinct assets and permanently affixed to real property and expected to remain indefinitely based on facts and circumstances, such as telephone poles and railroad tracks. 1031 and 1.856-10. 

I plan on repeating this process indefinitely.

Losses from rental property are considered passive losses and can generally offset passive income only (that is, income from other rental properties or another small business in which you do not materially participate, not including investments).If these passive losses exceed your passive income, they are suspended and carried forward indefinitely until future years, when you either have passive income or sell a property at a gain.Generally, the only time passive losses will offset your ordinary income from a W-2 job or another trade or business from passive activity rule which says you can deduct up to $25,000 in passive losses against your ordinary income (W-2 wages) if your modified adjusted gross income (MAGI) is $100,000 or less.  

It will also give you higher CoC returns indefinitely.

What happens when the schedule gets extended "indefinitely" because the builder has some kind of emergency?

If you buy for cash flow and plan on holding it indefinitely, it's a lot tougher to lose because people will always need somewhere to live. you're returns and rent and occupancy can drop, but if you underwrite in a way that it can sustain levels that drop, than you should be alright.

If it all went bust, I would probably sell at some point, but I could last almost indefinitely. 

My strategy is to hold indefinitely... 30 year, low fixed-rate loans on properties that cash flow 400 to 600 a month after expenses... the economy would have to get pretty bad before I would be in trouble, worst case I get a day job until things blow over I figure.

Obviously, many factors come into play here- but on the table as the example presents- the investor literally likely not afford to hold onto the house if he bought and expected to indefinitely STR it.