WTF are you talking about?
First, college has always been expensive. Your own argument that homes are at dual income levels is surprising as adults living with their parents is also having an affect at a lot of disposable income items. Housing is not so affected as many of these adults are still living at home 10+ years later and have nothing to show for it.
I went away to college and by the time I was 23 I was out, married and had a nice 3/2/2 pool home on the water in one of the more desirable communities. My parents took care of a lot of things like gas/insurance, but at the same time I was working up to 3 jobs at a time and saving money.
I qualified for little free college money and had to do loans for the rest and work summer's. I ended up with $7000 in debt for 7 years of education when I went the first time.
The second time I went back I had a life to support at my old income level. One year of college racked up a $40k tab...an ex added another $20k to that tab. This was not a problem, just the cost of doing business UNTIL my mortgage company screwed up my credit by incorrectly (and still incorrectly reporting) that I was not making my mortgage payments. They put me into some HAMP program without any agreement on my part.
Once that happened my 6-7% fixed rate credit lines went to 24%, my interest amounts were more than my full payments. That was my 'CREDIT PROBLEM'.
However; I fucking rocked that problem by doing some personal growth, working my salary up and basically paid off everything in a year.
Despite how messed up you think my credit is I qualified for a used car loan of $39,000 without even needing a downpayment at 3.75% which also includes GAP.
I was able to buy a new car too, I'd have qualified for the 2% rate, but my wife wanted to do it in her name only so she paid about 4%...we are paying the car off in about 3 years away so rate is not so important.
All those issues came 10+ years after I left home.