No vehicle may be parked on the property except within garages or on paved streets and paved driveways. No inoperative vehicles shall be allowed to remain on the property in excess of 48 hours unless kept in an enclosure and not visible from the street or any other lot. No commercial vehicles except those present on business shall be parked on any part of the property. For purposes of this provision, "commercial vehicles" shall mean cars, trucks, or any other motorized vehicles, and trailers that may be attached thereto, which are used primarily for business rather than personal use. No trailers, boats, campers. trucks, mobile homes, motorized recreational vehicles, or motorcycles may be parked on the property unless parked inside a garage or behind a dwelling, provided said vehicle cannot be seen from any street.