Ayla, many urban colleges have housing in regular apartment houses owned by the college. No RA's-you can have as many tanks as you like! The only problem is the fish care while you are away on break.
My son left Vassar (only closely supervised on-campus dorms) for BU (all apartments, except for Freshmen). He got his post-grad (at USC), he and his classmates got together (on line) and rented a large house! They have 2 cats, 1 dog & a pool, too...