I run similar (gitea, scrypted+ffmpeg instead of frigate, plex instead of jellyfin) plus some Minecraft servers, *arr stack, notes, dns, and my VM for development.

It's an i7-4790k from 12 years ago, it barely breaks a sweat most hours of the day.

It's not really that impressive, or (not to be a jerk) you've overestimated how expensive these services are to run.