Your best bet is to print up some flyers and business cards, and start talking to the realtors and mortgage folks in your area. Perhaps offer some type of incentive for them to try you the first time? Its all about getting your name out there and gaining the trust from folks to use your services. Join the local Chamber of Commerce, or at the very least some of the local service organizations like the Optimists, Lions Club, etc.
Network, network and more networking! Good luck!