Are you environmentally conscious and have a plot of land but no house? My Green Home in a Box may be the solution for you. Constructed with structural insulated panels (SIPs), it can be assembled by a licensed contractor in days. It has 965 square feet of air-conditioned space, is hurricane-resistant and includes a solar water heating system, interior finishes, fixtures, kitchen cabinets and appliances. It makes for a great free standing house or addition. It is estimated to be walk-in ready for under $100,000. Not bad.