This is precisely why I asked for advice beforehand. Thank you!

I actually don’t understand how a wiki with 22,000 pages of text and 4,000 files can be “very costly” to host. Please don’t go the wikipedia route with the expenses.

It's not, we're fine, but we need to think long-term for growth. We serve more than just one language, and they are growing. Plus, we are thinking of hosting our own communication server, something like Matrix or better. And we need to have storage ready for that.