Also known as a mobile home, house trailer, or trailer home, this kind of trailer is a portable pre-manufactured living structure. Some trailers are smaller, have wheels, and can be easily moved by being hooked to a strong vehicle (usually a large pickup truck). Others are larger and require the service of a commercial towing truck for transportation. Larger trailers are normally not moved often, and are used as permanent residences often in designated mobile home parks. They present a relatively affordable alternative to buying a home but can carry a stigma of impermanence and poverty.