ROTC
According to the wikipedia article:
	Quote:
	
	
		| ROTC produces officers in all branches of the U.S. Armed Forces except the U.S. Coast Guard: 56 percent of U.S. Army, 11 percent of the U.S. Marine Corps, 20 percent of the U.S. Navy, and 41 percent of the U.S. Air Force, for a combined 39 percent of all active duty officers in the Department of Defense. | 
	
 And this gem:
	Quote:
	
	
		| With the exception of the U.S. Coast Guard, each of the U.S. Armed Forces offer competitive, merit-based scholarships to ROTC students, often covering full tuition for college. | 
	
 Mind you, successful service in the military will also result in money for college, if he chose to go after the fact.
I also agree with what you said about him thriving in heavily structured environments.  And in that respect, he could probably do 
very well for himself there.
Here's probably a 
more specific one, since he's thinking of joining the Marines.