Write a Droid and iPhone app. Distribute it through the Campus store. Charge local mom - n - pop businesses for enrollment in your app
Sort of like the 70's yellow pages.
Should only take 100,000k in cash + the purchase of local politicians and the college board of trusties. SIMPLE
Ha, I mis-stated when I said it was a college town, I should have said it was a college village, everyplace is within walking distance of everyplace else; and there's not that many places.
If you look at googel's marketing for their paid for ads...you offer the same service, add 10% for setting it up, keep records, wash your hands of it, profit...let them deal with googel's renewal charge every month.