wife and i rented a basement apartment in big city while going to school. rent was HIGH and got virtually nothing for it. none the less we took care of the place, even painted it oursevles and at our cost. when we moved out a month early we couldn't get our deposit back. we were pissed. i probably should have just trashed the place to teach landlord a lesson..but instead we moved out peacefully and just "ate" the last month rent we never got back.
we were vindicated when we saw that their place had no occupancy for the next 6 months. hahaha..
i'm glad we moved out, i hated being taken advantage of
i think for the most part, a couple of houses with renters is fine for a neighbourhood. but as soon as it passes 10% .. it may be time to sell.