Limiting Listings Per Category

I would like to offer local business owners the ability to advertise without fear of ending up in a 8 page scroll competing against 46 other roofers.

My goal is to offer a limit of three (3) business listings (PLACES) per category, per city. When the limit of 3 listings (PLACES) per category in any given city is reached that category/city is no longer available for selection in the add listing task grayed out on the Category list based upon a city name until such time less than 3 listings are active in that category in that city.

I am using GEO DIRECTORY for an entire county. There are ten cities and there will be hundreds of categories. The sale of listings (PLACES) to local business owners based upon a limit of 3 per category per city means a statistical probability of increased leads, and a waiting list means the price per category increases when a city contains the limit of 3 businesses.

This approach makes the first three business owners very competitive, all three display above the scroll line so no need for featuring any of the three, and a waiting list filled with anxious competitors on a list in case a spot opens up in the city means the price per listing increases as compared to businesses cancelling next year after they realize they were not lucky and ended up on a long page 8 list no one visits in a lengthy group of 46 Roofers like the phone book does is useless position in a countywide community directory.

Buy early, pay on time, never quit secures the first three businesses and once the categories in each city begin to fill up there is room to enlarge and offer five (5) listings as a marketing strategy. The last thing I want is 38 real estate agents publishing an add when the consumers will most likely never scroll deep enough beyond first page of real estate listings.