Modest development as @Jaron Walling mentioned.

Years ago we did not provide laundry units to tenants, and found that when tenants had to move their own units in and out, they damaged floors, walls, cabinets, hooked the units up wrong, didn't properly install wiring or dryer venting, etc.

We added a wall, window & closet and made a 4th bedroom.

Seller had boxes and debris stacked up against the wall in the basement hiding a crack that needed a costly repair.

The duplex has great insulated walls so we can't hear anything from the other side.

Basement was "finished" in that it had walls and flooring, so we completely redid and made it an actual basement.

At one point I noticed a fist sized hole in the wall at about ankle height.

A low-cost way to do it would be to paint the walls, the garage door, and close off any access to utilities.

Hopefully you have left over paint and that is an easy thing, I wouldn't necessarily charge them for unless there are large holes in the wall. 

I'm looking for durable furniture, linens, construction materials, things like that.I have and STR and an MTR and the maintenance things just keep piling up: LVP cracking, paint chipping/peeling/bubbling, walls constantly getting marked up, dining chair bolts coming loose, stains on every piece of cloth and furniture.