Amphibious Trailer

Mid-range travel trailers are 18 to 25 feet (5.5 to 7.6 m) long, can weigh 5,000 pounds (2,300 kg) or more, and are generally towed with compact pickup trucks and SUVs. They have most of the amenities of the larger travel trailers, but sleep fewer people.
Larger travel trailers are made with the seasonal or full-time user in mind. These generally range from 25 to 40 feet (7.6 to 12 m) long and contain all the comforts of a luxury condominium. Because they require a purpose built tow vehicle, highway tractor or large truck or SUV, these amenity-laden homes can reach 12,000 pounds (5,400 kg) or more. While trailers may weigh in even above that, most long-box pickups have a maximum tow-weight of 15,500 pounds (7,000 kg). Multiple televisions and air conditioners are common in units of this size. Slide-out rooms and screen porches add to livability. By law, travel trailers are limited to 400 square feet (37 m2) of living area, and many models offer exactly that plus any optional slide-outs.
With all of the disincentives inherent in municipal zoning bylaws and building codes to affordable, ecological (off-grid) and compact housing solutions, travel-trailers offer a possibility for those considering an ecological full-time home or seasonal cottage. Travel-trailers are often acceptable on flood-plains, areas outside of urban growth limits, etc. where regular buildings may not tread. One of the great virtues of a trailer park is its light infrastructure, low ecological footprint, minimal land disturbance, abundant permeable surfaces (for stormwater drainage) and ease of site restoration.
Some specialized brands of trailer, such as the hi-lo trailer, have an upper half (slightly larger than the lower half) that can be folded down over the lower half to a total height of about five feet for reduced wind resistance during travel; these otherwise contain everything other travel trailers have (except for a full-height closet).