Not surprisingly, the “flyover” states of TX, OK and NE top the list.
Not only are houses relatively “cheap” (by coastal stds) in these states, but the “culture” in these states encourages living within one’s means, being as debt-free as possible and giving your kids a “leg up” in housing by subdividing your own land for them and helping them to build their own home on it.
However, I also noticed from the map that TX’s highly-urbanized regions were heavily mortgaged.