Uhm, getting PDFs for $10 or less is super easy and perfectly legal, as has been pointed out. If you have problems paying $20 for a book, how the HELL are you playing D&D? :P Since there, your choice are "LOTS of $50 books" or "Ongoing $15 a month subscription".
Or, you know, play a retroclone as Rhynn suggested, but which seems completely outside the scope of your experiences.
Have you tried like, actually explaining the situation? ^_^Personally, getting players together on a different system is a chore. Homebrewing rules is also a chore, but less so.
Actually, as folks have pointed out, many of my assertions are also true for you. This hobby is cheap.Your assertions may be true for you, but they're certainly not true for me.