Not only that, money must have been a tremendous concern. We don't know how long George was out of work, but based on the myspace msg about getting him a book about unemployment for dummies in 2006, and the fact that he just started a new job in July 2008, it would seem he's gone through periods of not working.
We already know that Cindy has been financially supporting both Casey and Caylee.
I don't know how much money she makes, but whatever it is she's been supporting a family of four on that paycheck.