Idea one: I'm a renter, I want my landlord to fix something for me. Can you enable me to video it with your app and get the landlord to either signup, or at least fix it with his normal contractor?
Idea two: Say I'm a landlord, my renter complains about something being broken. Instead of hiring a property manager, I want to make my renters download the app, submit a fix request and then I'll approve the proposal thru you guys. I'm not a landlord but I could imagine wanting to become one if I didn't have to deal with handling these requests.
I think this is one of those ideas that's hard to distribute, because you aren't needed often enough for people to even remember your app's name when they have to get something fixed. So you'll need a really compelling distribution strategy; maybe landlords can talk to each other or you can go through landlord associations or something.