My parents owned rental property for years. My mom had to go in and clear out trash, scrub toilets, mop floors, etc. after people moved out. My stepdad was on call around the clock for clogged toilets, busted pipes, HVAC that needed repairing and so forth. Plus advertising and finding qualified tenants.

It was a lot of work! Plus tenants were late with payments or moved out owing money.

My parents had built up good credit to afford the mortgages on the properties they rented as well as all the skills needed to maintain them. And both of them put in a lot of work to maintain their hands-on business!