Hacker News Reader

Thanks. S3 would work fine for me (from a tech perspective), but the question is, would it offer ~500 GB storage for under $10/mo?

According to their calculator[1], it's $15. Less than $10 seems unreasonably low for what you're asking.

You can use S3FS (https://github.com/s3fs-fuse/s3fs-fuse) to mount your buckets and make it look like just another directory using /etc/fstab