A full ride from a TTT is still a full ride, and even at the worst schools the tippy top students might still have job opportunities. Besides, he should be able to tell after 1 or 2 semesters whether or not he's going to be one of the top students.
Except a full ride is only as good as the job you land afterwards (or a job at all). Not to mention that top third sTTTip on it.
Almost irrelevant since he should drop out if he isn't in like the top, I don't know, 5% or whatever.
Also, if he lives at home all three years, he could come out with minimal debt. Full ride + low CoL isn't bad by any means. It means he could even try it out for like a semester without really going into any debt at all.
But again, I offer this advice only if, for whatever reason, he absolutely HAS to go to one of these schools. TCR is retake.