I have nothing normal and sensible to add to that... but I am not famous for being sensible.
https://en.m.wikipedia.org/wiki/El_Paquete_Semanal
If you want to go full cyberpunk, download all the resources that are available (ZIM files for wikipedia, medical wikis, whatever might be available) and build a sneakernet.
USB transfer speeds are much higher than an average rural internet connection, so getting a copy of some large videocourse that may be free online would take minutes as compared to hours, after which the copy is there forever (until deleted).
It may be a question of what data you want to stick to, if it's just open and downloadable resources (ZIM files from wikipedia or the like), or if you're gonna wget any free resource regardless of "general downloadability" (yt-dlp is a thing). That depends, but as a public institution, you could get in touch with the producers and say "Can we archive your stuff in our library and use it in a sneakernet?"
List of ZIMs to be opened using kiwix (a wikipedia reader/backupper): https://library.kiwix.org/#lang=eng
The investment would be HDDs/SSDs, flash drives or anything. Then, you can copy the needed stuff to them and spread them around.
It's a wild dream, but you are librarians, you know how to store any data and archive.