Concrete Canvas Shelters (CCS) are rapidly deployable hardened shelters that require only water and air for construction. These make excellent bug out cabin/houses. They are cheaper than building one too. There are loads of advantages of having one of these and that is its ability to be fire proof and it;s ability to be turned into anything you like, on the original article one is an ER room.
See why this maybe an option for your family below: You have to read this to believe it.