The fundamental idea behind parking lots is to generate revenue by renting space for people to park vehicles. Parking lots can range in complexity from a simple open lot, to a multi-story structure with automated space counting technologies. Successful parking businesses can often be found in dense urban areas where there is a high population with limited ground-space. Revenues generated from parking are dependent on the demographics of your area, for example parking in a downtown financial district can be priced at a premium. Overhead is dependent on the facility. A simple paved lot will have minimal overhead, however a multistory garage with automated payment processing will have significant overhead costs.