It will cost less than $3000 to pour 8" thick concrete walls for a house I am building. I don't plan on using ICF's or SIP's simply because they cost too much and are too hard to get around here. What I want to do is form them up. (I already have a lot of forms) Put in some rebar and pour. Then I will finish the inside with furring stips, 4'X8'x1" polystyrene insulation sheets, and sheetrock. Does this sound like a reasonable building method?