Shewolf, I got an error code when I tried to save yesterday. I sent someone from the household to a community lot and was able to save from there. When I tried to start my game, I couldn't, for two or three times, but the 4th time I got in. I chose the auto-save, deleted my old save, and have been able to play with no problems.
As for bulldozing the house, there's nothing in the rules against doing that. Just remember to put your immortals' collections in family inventory beforehand.