If you are planning on building an ICF home, you ought to plan on at least putting a saferoom into it. We promote building in a secure room....security for firearms, security for valuables, papers and of course the family. If costs are a concern, if you can locate the room where it becomes an integral part of the exterior walls, then the cost to add the room is minimal especially since most of the material and pump will be there anyway. Your main expense is the door.