If you are still following this thread....
Look into Ecoblock
ECO-Block Energy Efficient ICF
I've done a couple of them...You build the forms from Styrofoam blocks that have plastic beams running through them. You assemble them like Legos. Rebar is fastened inside of them and then the walls are filled with concrete.
The forms remain in place as outer and inner insulation (you don't waste materials) and the plastic running through them can be used as wall studs for attachment of Drywall.
Electrical is run through channels that are dug out of the styrofoam.
The walls can be poured quite thick as needed. Construction is EASY and the insulation value is very high.
jmp