That's slumlord territory and not any morally better than corporate landlords unless your average unit size is a 4 bed/2 bath.
Also there is zero world where you have 6 houses, 50+ people and can call yourself a small time landlord. That's being able to live entirely off of your rental income and a full time landlord. You could maybe, _maybe_ get away with describing yourself as a medium time landlord.
Small time is living in a 3 floor house and renting the other 2 floors, or owning 1 other home to rent.