As long as your not in a competitive area, you'll probably do fine.
I work with 100's of dealerships, one of our main products is an advertising product dedicated to automotive dealers that creates ads for each individual car and places those on Google, Yahoo/Bing through PPC. Works great and dealers love it... however, I do hear some of the bad news from time to time.
Just had a dealership we've been working with for about 7 months tell us he will be shutting down shop in December. He can't compete with the larger dealerships who are able to buy cars at better prices and spend tons of money on ads. Plus, with sites like AutoTrader, Cars.com, Vehix, etc., its a game to see who can list their car for the lowest price.
If your going to use those sites and don't plan on competing for the lowest price possible, it's going to be tough, but good luck.
Once you get up and running, hit me up and we'll hook you up with some ad dollars to try out our product to help get you going
