Billboard and TV ads are Creative advertising. Meaning that you have to create a need for your product and hope that they buy from you. What you need is directional advertising. TV ads are a waste anyway, I dvr my shows so I never see the commercials and who buys from a billboard. Place an ad in the Yellowpages and on-line. These people are already looking for your product and will buy it from somebody. If your ad is there, then you have a good chance of getting their business. Plus the ROI is much much better.