A Park Model RV is built on a single chassis mounted on wheels. They are designed for occasional travel but not intended to be towed on a regular basis. Park Model RVs usually require park facilities to function. It does not have holding tanks or dual-voltage appliances, meaning it needs to be plugged into water, sewage, and electrical facilities. Because of this, Park Model Trailers are ideal for more long-term or permanent residence as a vacation home. Often they are placed in a park and added on to, with a, a deck and occasionally additional rooms and skirting.