My guess is it’s less about the actual cost and more about the changes and the,IMO, not student driven thinking behind those changes. I’d be pretty upset about this. I don’t think the block system, especially with APs, is good for most kids. (I’m sure someone will come along and tell us how it’s great for their one kid - congrats - that’s why homeschooling was invented. Schools are supposed to do what’s best for most kids at their school.)
@Golfgr8 have you considered a parent coup? Get in touch with other parents, email deans, etc.
Also been told that there are some excellent ap study guides on YouTube. Just in case.