I don’t develop complete course materials for every course I teach as (1) I’m not paid to do that and (2) that’s a LOT of time! But for the material that is mine, that is I own the copyrights, I do distribute it electronically. This works for my students because our program requires each student to have their own laptop.
Well, it works for most of my students – my university is in a place where the Digital Divide is far too real. Some students have no internet access (much less truly high-speed) access. And many students are using a laptop for the first time – and only because their scholarship/grant/aid/loan covers it as a required resource.
When the materials are printed, I always make sure that our library has at least 2 or 3 copies on hand to loan out for an hour or two at a time.
The cost of text books is really obscene, but I make every effort to minimize that load on my students where I can.