I think your best bet is community outreach. Get involved with local businesses, groups, and programs. TV is for large mass market brands primarily and don't deliver the return you'll be looking for with your niche product. Even the largest property management companies don't invest in TV because of this.
Also turn to your current residents. Find out where they work, what groups or organizations they participate or are a part of.
Network, network, network.
Also, your market is online. You just need to target them properly and find out what channels they are using.
I would need some more details on your situation to give some specific ideas, but I can't support a TV investment for many types of small businesses.