If your goal was to house people then you could just charge the amount of property tax since your mortgage is $0. So, oof, yeah I do totally got you. Your investment is paid off, since the house is paid off. The only thing left is just wanting people to pay you for nothing.
Embrace what you are. Stop trying to abstract it behind being a saint or appeals to the market.
Did you know that the US once tried to import hippos as a source of meat, as an alternative to cows?