21k here, in my area, would have your footings, 6 inch walls, and the floor.
It isn't for everyone, but then, what is?
Dont get me wrong/take me wrong, I believe it's an excellent product, esspecially when the contractor/s know WTF they're doing....the string of badly installed product in my area is off the charts as is most concrete related work since it's yet another phase of construction that everybody and their brother thinks, "it's just concrete"...we've been on site to 4 brand new townhouses having french drains installed due to improper overall installtions and the owners that bought the structures cannot say enough bad things about ICF construction since they've paid to have it "fixed" and the few structures we've sided...holy cow, i wish the walls were just bowed and wavey but when you have 3" dips in walls that's excessive and i dont care what the excuse LOL!!
The few HO's i've talked to with jobs that have gone right love it, and there is no way one can argue with the effeicency of these structures or the strength, it's fantastic!! Unfortuantely the cost is very very high initally and then unless you hire one of two crews that i'm aware of dealing with it, your taking a huuuge chance that the end product will be worth a darn anyhow...it's sad really since as my rep told me, "we're trying to push this product and the best and with the best comes an increased price obviously, but then you have just any tom, dick, and harry installing it; installing it wrong, and all the people remember it for is the problems. An you know how fast bad news travels"
Had it been relatively cost comparible, i'd of jumped on it since i'll be out there ALOT and the sound deadening properties for when we fire up the race car/s would greatly benefit my neighbors patience wth me...but like i said, they really like the product judgeing by the price.....mine were bid with 8" walls due to heigth, if i'da dropped down to a 10' wall they told me we could've pushed the envelope with 6" with increased steel schedule, so it would've been a bit cheaper, but no enough to really say, oh my...go with the narrower wall. But i was looking at almost $40K for just the complete 30x40 shell using ICF's....and like i said, i can build two with spray urethane for that amount here in my area with wood...energy cost/savings would be negligable between the two..