That is a great idea Rick, may have to so something like that...
Our basement foundation is called Ice Block which is an insulated concrete form. Many home builders used this now in place of standard concrete poured in forms, that are removed after the concrete sets.
Basically, you have insulated foam on the inside and outside, with an 8" void in the middle that is filled with concrete. There is rebar placed vertically and horizontally within the void. There is a 2" wide plastic strip about every 12" where you can screw into like you would a stud for hanging things. You don't have to put up any framing, the drywall screws right to it.... the R value for efficiency is way above a standard poured foundation.
