$30 a month is a pretty massive costs for such a program. Why does it require such a beefy VPS, is it just the initial bootstrapping that requires such resources?
Because if you want to relay every single public event for every single user on the entire atproto network in real-time to many consuming apps and services… that's gonna cost something. Not that it costs a lot, but to expect what a relay does to be infinitely cheap is to not understand what it's doing or why it's doing it.