The standard unit with 338 square feet features all the normal conveniences of the typical suburban home, including kitchen facilities, toilet with shower, power system, and carpeted floors. This is all achieved for less than $2,450.00 and the economy unit which has the same amenities but is scaled down in convenience and dependence on electro-mechanical support costs less than $1,050.00. The deluxe version includes even a color t.v. among other convenient luxuries, and costs less than $3,850.00. Three plan variations were developed around the service module. One departure, for the sake of low cost and in keeping with the minimum living level acceptable under vacation or emergency situations, is the ladder access to the second floor. Because the plan dimensions are tight as much living space is achieved as possible by limiting the furnishings. For example, the second-floor furnishings would normally consist of sleeping bags over rugs or sheets and blankets over the rugs.