Actually, I suggested he might work for a year and I also mentioned the military option for the experience and discipline he needed. Coming from a small rural school to a major university was also part of the equation.
I once worked for a guy who had a son in a similar situation. The kid barely made it through high school, then spent a couple of years drifting from one menial job to another. He ended up working at a gas station just because he wanted to work on his car during off-hours, and from that he learned some good automotive skills. A friend of my boss recognized the kid's skills and suggested he could get him into a top-rated school for airplane mechanics. The kid gave it a shot, and after a few months of school his instructors told him that he was capable of far more than just the hands-on mechanical stuff.
To make a long story short . . . he eventually got through one of the top aeronautical engineering programs in the world, and the last I heard he was one of the leading avionics experts for one of the big U.S. airlines.