D.M.
Hi, our current home was in foreclosure when we bought it. But there was a realtor sign up in the yard, so it wasn't that different than buying it from a person, we just bought it from a bank. My advice on how to get the ball rolling, is to talk to a realtor in the area, and see what they can find out about the house, whether it's already in foreclosure, or what. Also, talk to the sister of the owner again and see if she can get info from the owner about who the mortgage is with. Then you could maybe contact them directly about buying it, or for info on when it'll be in foreclosure. Hope this helps!
D.