Our dues are fairly low. (comparativly) We have a house, but the college owns it. When you live on college owned property, at least at Beloit, your financial aid is higher because the know your room costs. Houses that have independent houses seem to pay a lot because they'll also have to pay for upkeep on the house, which in my case, the school takes care of. I don't know if it would work, but you could try to ask the greek office for info on dues,they might have stuff, not sure though.
Good luck!
Lil E