I think the "officers" who admitted to having sex with Casey are a clue. :crazy:
What Casey was doing at Universal that wasn't work and wasn't fun is also a clue. :crazy:
I think Casey was earning money doing what Monica L. (the one of blue dress fame) :crazy::crazy: is known for doing.
No apartment needed. :woohoo:
No need for a babysitter, Caylee could wait in the car with a book & toys.
Enough could be earned for target dresses and some gas money or to buy drinks but Casey would need to steal to impress Tony and send her friends on trips. (I doubt Casey worked any more than she had to at her "job" or did it more than she had to.)
It would explain a passing aquaintenance with a woman in her late 30's that didn't live in her neighborhood.
IMO