> I’m not yet ready to cough up the cost for Cloudflare R2 and AWS CloudFront

> but I’m still in that cheap-feeling phase and not ready to offload over 100GB of files to the public while paying a price

You wouldn't pay like anything for that on Cloudflare R2. You get 10GB and $0.015/GB (so what... like a dollar or something?) for anything over + free egress.