I've got a R620 and it's an outstanding box for labbing. I only keep it on when I need to use it, and it's in my basement for the noise issue. I max out at 300 watts with everything started, 170 idle.
I turn it on with the idrac when needed or with Home Assistant.
I'm glad you enjoyed it! I've never looked back, it's a wonderful change.
I was an ESXi fan for over a decade until I found proxmox.
Now I use a combination of VMs and Linux containers.
I use containers for:
Pihole, Ubiquity WiFi Controller, Plex, Audio Bookshelf, imfluxdb, etc. And VMs for Home Assistant and Untangled.
https://ramblingnonsense.substack.com/p/a-journey-from-esxi-to-proxmox-in
You should try Proxmox. It's better in almost every way.
By only having it on when I need it.
People that have theirs on 24/7....why? I used Home Assistant to automate mine so I can bring it up remotely if needed.
Here's another great source for PVE scripts.
https://tteck.github.io/Proxmox/