Spotted pythons, children's pythons or (my favorite) Stimson's pythons are great easy to take care of pythons that don't get too big and are generally very docile. If the room mate is concerned about
IBD good husbandry and a proper quarantine should take care of the issue- It is my understanding that Boas acutually harbor
IBD much longer than pythons which can be affected in a relatively short period of time. My daughter started helping me with my snakes when she was about 8, I think it was a great experience for her!

She's 21 now!