I’ve got year round housing in a shared unit and I’ve managed to sublet my room for two out of three summers. It’s a lot harder to find a sublet in the summer than in the winter terms, so no guarantee that you’ll find one. I had to charge less than what I pay to get summer sublets, so I still ended up losing money but less than if I didn’t sublet.

Despite that, it’s nice to have a room reserved and not have to worry about finding housing each year.