market is, students still get clobbered. It's an indirect transfer from church funds to Provo landlords.
students are willing to pay $x for a BYU education -> BYU charges below market tuition -> renters nearby can charge more -> students still pay $x, but more of it goes to rent and less to tuition.
Honestly, BYU should build a skyscraper and house all the students inside, just kill that whole market.