[You Need a Thneed]

My dad (Gold Seal Certified estimator) has done calculations in the past, you can form and pour a concrete wall, then clad it with insulation on both sides for cheaper than buying the ICF blocks. You basically end up with exactly the same thing, probably even better insulation.

ICF blocks are a more expensive way of doing the same thing.

Let's put it this way, there's a reason why virtually no contractors do them - there are cheaper ways to achieve the same benefit.