My parents and grandparent were landlords for years but I never asked them how they made that work. My grandparents converted their house into a duplex and rented the upstairs to groups of young, working women. The also converted their huge garage into a two-bedroom house and rented that. So they always lived on the premises where their rental units were. My Dad simply kept the first house he bought when we moved to a larger house but I didn't know that as a child so I don't know how he managed it. But, I never got the impression either of them had any problems. But, we all know life was different back in the 1950s.
Linda