I played as thief first go round and joined the Guild, I'm not sure which door you can't get in?
I did buy a house, don't waste the money..you can't even live there! The few points it was worth wasn't worth it.
Tried renting too, same thing-couldn't stash my stuff or me there, very aggravating. I think I just wound up renting a room at the inn.
Let me know about the door-where it's at and all, it may jog my memory-that's a big MAY JOG, but one never knows.
Playing Morrowind and GhostMaster 2 great games