Scott,
You have my sympathy, we took care of my mother-in-law the last five years of her life (a labor of joy, she was a really wonderful woman) and although we did so happily, having to juggle kids, a job and taking care of an adult can get pretty interesting sometimes. And I'm really impressed because you're going to school on top of it!
Sorry to hear Samy is having such a rough time, she's such a great kid.
AG