I would like to see some figures on blue collar ownerhip. I can't prove it, but I have a hunch that in the last 40 years, home ownership amongst blue collar families has fallen off markedly.
Houses cost so much because mortgages cost so little.
And also because in the most expensive regions, because both spouses usually work.
Nonetheless, I know plenty of young working couples, both with master's degrees, who today can barely afford to buy a home like the one my high-school drop out factory laborer cousin with the stay at home wife, bought in 1963 at the age of 24.