I'm from BC, Kelowna specifically.
I've never taken CORE, or had a PAL previously.
Challenging PAL -> good thing OK
Second question: Buy RPAL text and challenge that as well? or should I take it slow?
My son had never taken the CORE or PAL courses. He had shot with me, with Cadet Biathlon and in Army reserve. He challenged both with no pre-reading and passed both.
However, I would recommend buying both books, read them thru 2 or 3 times and challenge. While most of the exam content is common sense to an experience shooter there are some questions where the required answer is just plain stupid and nobody will ever do what the books say. There is also some terminology that may not be familiar to you.
If money is tight do you know anyone that you could borrow the books from?