[aephi alum]

If there is an obligation to live in-house for a certain period of time, or the possibility of being pulled in to fill the house, potential new members should be informed so that they can factor that into their decision process.

One sorority at my school has a large enough house that it's pretty much a given that you will be living in the house during your sophomore, junior, and senior years if you join. You don't like it - don't join.

Another sorority (with a smaller house) handled the question of filling their house in an interesting way. Certain officers had to live in-house. The remaining beds were offered first to seniors, then juniors, then sophomores (freshmen must live in the dorms). If any spots were still unfilled, no one was forced to live in, but all sisters who were eligible to live in but had turned down a bed had to split the rental for the empty spots. That way, the chapter still got its revenue without forcing people to break other housing contracts or arrangements.