Oh, I totally realize that only a local lawyer can give me the best, most relevant advice. Support is what I'm seeking here, not legal advice.
And to clarify - the kids and I don't live WITH my inlaws. They own the house that we live in, but they have a separate home.
I had thought about the storage unit idea, but I didn't think about the lease issue. I do know there are places that do month-to-month rentals.