Look at it this way, how many big name car rental places do you know of in Detroit such as Avis, Alamo, Hertz Etc?

If im not mistaken, they are all located out by the airport!

Part of my business is renting U-hauls, and if you ever take notice you will realize that all the crappy trucks are in Detroit and all the nice new shiny trucks are out in the suburbs. Did you know U-haul rents cargo vans and pick up trucks? You can only get them in the suburbs and not in the inner city.

For some reason, the people who rent the trucks in the city tend to put more wear and tear on them when used in the city.