I'm in my mid-20s myself, but I'm active-duty military and working on my Graduate degree. Back in California, very few young people are entering trades. I worked consturction for a year after high school and I was the only "under 30 anglo" out there. The rest were, like he said, late baby-boomers and immigrants (not illegals).
I am sorry to say that few young people know what 'man hours' are.