Hrm...don't you have what some places call a "parlor fee"? I know of one sorority at my alma mater that charged a set amount of "extra" dues that a member had to pay if they chose not to live in. After all, the meetings and events are held in the house. It's there for everyone, not just the live-in members.
Since it's sounds like you're stressing the money issue, maybe this is something to consider?
.....Kelly
