If race is barred then the next method could be increased emphasis on perfect price discrimination to distinguish applicants socioeconomically. Outrageous tuition prices coupled with generous "scholarships" can also create a diverse student body.
Sorry if I have missed your point?
Also, Biloxi is very affordable![1]
[0]https://www.federalreserve.gov/econres/notes/feds-notes/weal...