I would agree with BNA(Nashville)...City Managers are user friendly when it comes to the airport since AA pulled out...But I would stay away from the RJ size aircraft if you want to make money...The yeilds of the profit margin are too close and you could loose your bum fast...Examples...Midway and Independance Air tried to use those types as a primary aircraft and lost money with them....I would look into contacting airport managers and get info from there...You'll be surprised how expensive it is to utlize an airport as a hub...Some places charge ramp parking at different rates if it's lighted!...Good luck with your reasearch project.