Like Mark, I think you need to be creative. Back in the Dark Ages when I went to college, there were guidance centers and "hot spots" around campus. Both had bulletin boards where folks posted notes like: "roommates needed". The college also had a list of local homeowners who would rent rooms to student for cash or work as payment-in-kind. Talk with your friends, local off-campus frats, churches etc. Someone will know of that extra space.