The house is small (1400 sq ft) but very well built and energy efficient. I built it with ICF (Insulated Concrete Forms) for both the basement and main floor. I can link you to a couple of build threads I posted on other forums if you're interested. I did most of the work myself, only hiring out excavation, concrete, and drywall. I did everything else single-handed, including framing, roofing, flooring plumbing, electric, HVAC, and cabinets. No, I'm not in the business; I did a lot of research, as many of these things I had never done before!