It is the intent of this chapter that lot sizes shall conform to the reasonable needs of the use proposed. In the determination of minimum lot size, potential expansion and growth is an integral part of the reasonable needs. Furthermore, a use may change and, thus, change the parking area requirements. Therefore, to compute minimum lot size for any use, the building footprint, specific parking requirements, driveway and circulation requirements, accessory use areas, setbacks, sanitary sewage facilities, wells and storm sewer water detention basin requirements, plus 50% for reasonable growth, change and expansion combine to determine minimum lot size. In no event shall a lot being created be less than two acres.