I've wondered about that too. I thought that the money and checks that KC stole from Amy would come in as they're pertinent in part to what KC did during those 31 days - shopping at Target, cashing a check at the bank, and shopping, when she didn't have a job or any source of income.
But so far, the financial aspects have only been alluded to in the questions LDB has asked Cindy. In particular, she asked Cindy if she went to Universal Studios on July 3rd due to a financial issue that had come up, and Cindy confirmed that was the reason in addition to wanting to see Caylee.
I suspect we're going to see a lengthy sidebar about whether or not the fact that KC stole money and checks from Amy can come in.