All four law schools in Minnesota have a higher cost than the average cost of law school (University of Minnesota, Hamline University, William Mitchell College of Law, and University of St. Thomas).
If she wanted a law school close to California that had a lower cost than the U.S. average, she should have considered Arizona State or Arizona. Both are ranked higher than Pepperdine yet cost below the national average cost for law school.
So the general point stands that the availability of student loans appears to make students insensitive to the price of a more or less commodity thereby ensuring that the prices will continue to track with the availability of student loans.