We agreed to sell our house, thinking we had another house lined up to buy. The closing is in two weeks. But our new house's seller turned out to be a total flake, and our purchase deal fell through. We're about to make an offer on another house, but there's no way that sale will close soon enough for us to have a place to move into when our current house is sold. What can we do to make sure we don't end up living out of our car?