Hello There,
I'm not a member, but I do live right outside the city that I attended church in for almost 20 years and lived in as a small child. :-)
I briefly considered a school in the District so I'm somewhat familiar with the city.
The rent in DC all depends on what section you stay in. Also, remember there is a MD/DC/VA triangle, so many people work in one state and live in another since the Metro Area is so close together. I live in MD and work in VA (which is only 15 minutes away) and my father works in DC (also 15 minutes by car).
Basically a one bedroom can be anywhere from 400-1500. If you are near the nicer area's such as embassy row and capitol hill expect to pay more. Most anything in the Northwest area is going to cost you! If you go to
www.rent.net you will be able to get more of an idea on prices.
Where in the city are you going to be working? There is a graduate chapter of Alpha Kappa Alpha in DC. Maybe you can contact them and get some assistance. Who knows, they may live in a building that's just right for you.
Best of Luck.