Last I saw they start around $18.00 an hour at Caterpillar in Peoria. That was around four years ago. I suppose with overtime they could afford a house. That is if they don't splurge and put some away for the infrequent layoffs.
Just as a side note. A Machine Operator, Grade Four, makes about the same.
Now, one has to realize the contract has two levels. One for the old timers who make more, and one for the newbies who make less so the old timers could keep making more. AND, then there are the jobs leaving, not just for other countries but for other parts of the U.S. such as a recent move to Texas where starting pay is about $12.00 an hour.