advertising for new business venture

[tigman250]

I recently started a medical repair business, one that specifically targets Chiropractic tables. I have gone to the local businesses and shook hands while dropping off a card. I have gotten over 70% of those customers to bite and hire me to do their repairs and maintenance. I am still doing a day job so driving over an hour to larger surrounding towns to advertise face to face isn't feasible. I just bought 100 postcards advertising my business and plan to mail them over the weekend to areas within a couple hour drive of home. 1. how effective do you think snail mailings are anymore? And 2. what other ways do you think would be a good way to advertise? I have high hopes for this venture as to the best of my knowledge there is only one other chiro repair place in the state and everyone that I have had contact with is not happy with his work or reliability. Thanks all for any advise!