UT is a great safety. I think Baylor has better med school advising, though.
Speaking of Texas schools, there is a BA/MD program at UTSA.
So tell us more about him than what he thinks he wants to study. Does he like the outdoors? Play a sport? Music? Is he religious? Does he want to experience life outside the great state of Texas?
He sounds like a great kid who could do well in a lot of different environments.