Thank you for running a server! I am worried though about server costs (including your time) as it grows, do you foresee this becoming an issue?

https://m.youtube.com/watch?v=a4ldmt3eU2I

you say that like it's a bad thing

FWIW Coursera will generally let you take courses for free if you apply for their financial aid. It's annoying the first time because you have to write a couple short essays but I've just written them once and use the same ones over and over without issue