“I don’t understand why you’d run so many VMs can you can just run it on bare metal”

It’s fun! This is a hobby. It doesn’t have to be practical.

Get rid of that molex to sata adaptor, they catch fire. Molex to sata = lose your data

6 nodes? I assume you mean containers and not nodes. 6 nodes is overkill for any home user.

I’d suggest using prowlarr over Jackett since it integrates with sonarr and radarr.