Ran across this discussion string I started six years ago. I still have this rooming house and it is a superb investment. Here's what I've found:
1) Dealing with the rooming house takes only slightly more time than I do with apartments. I've hired out things like cleaning which is done every other week.
2) I did set up a coin operated laundry. It makes enough to cover my water bill and is a great convenience for the tenants. Helps keep the turnover minimal
3) Demand is high and tenant turnover is low. The spike in rents has driven the demand for rooms. It has changed the demographic of those looking for rooms.
4) I screen thoroughly. No druggies or criminals. Residents are employed and working. If a bad one slips through, I get rid of them quickly.
5) I got rid of stoves after one of the residents caused a stove fire. I provide a hot plate in the shared kitchen and microwaves and dorm refrigerators in each room. Getting rid of the stoves remedied the fire risk, heavy duty cooking and cleaning.
6) Room are single occupancy only. I have one studio that is occupied by a couple
7) All rent is collected via cash app.
8) I have room rental agreements in English only (majority of tenants have been English speaking). I would not provide a Spanish translation. It's the tenant's responsibility to handle the translation.