You can cherry pick or invent numbers all you like. But if you have a couple earning, saying 90K, which should qualify for a 500-600K mortgage, at either fixed or floating/variable rate, what percentage of their income goes to closing/housing, assorted insurance, property tax, maintainance and repair, etc?
And the same couple, where only the husband worked, in say 1955, what were the comparables? And don't make it up.
That is how much they spend for housing. That includes all those things mentioned both in 1950 and in 2004.
The costs are per household not per family. Single parent, single person and families all count.
So your whine about only one parent working is as ignorant as the rest of what you have posted here.