Earlier quoted context omitted.
> when rents are less than the price of the mortgage, people don't rent out houses. The notion makes absolutely no sense So they're just going to let the house sit empty? Buying/selling a house is a long term proposition because of transaction costs. Partially covering a mortgage payment temporarily is better than not recovering it at all. If the rent payments can't cover the mortgage, they're probably going to take…
Awesome, so show me (I don't literally demand that you do, but rather mean anyone) actual data of rents that are lower than corresponding mortgages. Anecdotal evidence is very, very much to the contrary.
If you don't have enough equity to cover your loss on a sale, it absolutely can make sense to take a small hit on recurring mortgage payments.