Ugh, at least when you buy a textbook you have the option to keep it. I’m actually revisiting some of my college textbooks to study for the ARE.
I spent a LOT of money to do my homework in architecture school (cost of pencils, rapidiograph pens, very specific paper we were expected to draw on, model making supples) but at least I had a physical thing at the end of it that I could show off! I wish I still had records of how much I spent each semester on supplies, it was insane. I think I probably spent $200/month and then more at the end of the semester on materials for my final presentation.