A problem I've seen is that since the 90s there has been a progression from small, affordable ranch houses and such to minimansions. Homes have simply gotten bigger. One thing driving it has been the double income household, not only has this driven up prices since the homes simply cost more to make but with two people paying the mortgage you are now in a situation where if one person loses their income you can't cover for them. If it was a single income household and, say, you got disabled the other person could possibly cover for you.