Hank Butitta converted a typical yellow school bus into a small mobile dwelling for his grad school Master Final Project. He bought the school bus on Craigslist for $3000, and invested another $6000 into its transformation into mobile home. All together, this is less than a downpayment on a home, and the school bus can function as a normal house.
The transformation started with breaking down the bus into 4 sections, namely the bathroom, kitchen, seating area, and bedroom. Since the window bays in a school bus are evenly spaced, the interior space can be broken down into modular units of 28 square inches, which also leaves space for a center aisle that is also 28 inches wide.