http://hdh.ucsd.edu/housing/incoming/pages/Rates.html
some info on room and board rates
a triple dorm room with the 3536 plan (2 meals a day, 5 days a week, would have to supplement with bf items, snacks, and food for weekend) is about $11,000
You will also need some money for incidentals, extra food, etc so plan on getting a work study job on campus for your personal expenses.