My new family have debt, so can’t move them anywhere?

Don't know if this will work, but if you have Get Famous, the little park is 0 simoleons when you bulldoze it. How in the world did they get in debt, lol?

Added: Also, if that doesn't work, this is what I would try. Start with a new sim, cheat as much money as you want onto him/her, and then move him in with your family in manage worlds, or them with him if from library. Then you can get rid of him by moving him back out but leaving his money.