Local search traffic would be good to capture. You'd need to build a website and rank it to do that.
If you can get some nice videos, then you can also rank them in the search results. I've seen some amazing real estate videos shot with drones, but then you have to worry about the regulations regarding that.
I've been talking with a couple of real estate people and I think that a geo-target Instagram account could work really well for the industry. You might want to look into that as well.