Gulf American Land Corporation, seen on the airplanes, is the land development corporation that create Cape Coral.
When filmed, Cape Coral was not a city, but rather a land development project. Having the show filmed here helped promote the development project and was used to aid in sales. As such, most locations seen were all part of the development company. This includes the air field and the Nautilus Motel.
As Linc drives into Cape Coral, they come in on an improved rock road, which seems strange for a main highway. In fact, this is not a main highway, and is a road that leads only to the housing development and was built by the land developer.