If one was looking for such a landlord, what should they be looking for on the listing? Is there a common place where you might choose to list a rental that's not as frequently used by big players?
Ask your friends and extended family about it. Especially if you're looking for single bedroom apartment. You never know, X's grandfather can have a small appartement he doesn't want to put on the market because it's a hassle, or your cousins' family (the other one) can have the perfect appartement for 2 people, 2 minutes from the sea, 5 from the train station, and you just have to wait a year for it.
If one was looking for such a landlord, what should they be looking for on the listing? Is there a common place where you might choose to list a rental that's not as frequently used by big players?