Furinshed option is grey out and sometimes goes black screen?

I am having an issue with my Sims game. I am splitting one family into two parts-one is the family which will stay in the 'main house' lets call them family A and then Family B. I try to move family B (who has more then a million bucks) into one of the cheap houses but the thing is the "furnished" option is greyed out-I only have the option of "unfurnished" or "bulldoze Lot". I don't want to have to put them in an unfurnished house since when I try to do that-when I try to get their necessaries-my game goes black and full-screen. I have tried everything, freerealestate on, deleting caches, and nothing has worked. I don't want to re-do a new game again since it would be my 3 new game since two-three days ago.