The one (very minor) thing that bothers me is that Alexis says that she can get work study money. Bullshit. I work in the Financial Aid industry and unless she legally emancipated herself, Castle's money would never allow her to be eligible for financial aid, which does include work study.
That's true, but sometimes student jobs open up on campus, and there's either more jobs than students receiving aid, or jobs that nobody
wants, regardless of their circumstances (cleaning up after the monkeys in the Psych department was a perennial 'winner' at my alma mater). People like Alexis with means would be at the end of the list for those jobs, though. It's also possible she got a job on campus that wasn't needs-based, and she's just using "work study" as a generic term.