Oh you sound just like me haha
Here is my work in progress:
https://www.reddit.com/r/homelab/comments/d13026/rack_day_finally_terminating_my_patch_panel/
It is a 18u rack. I've got a 4u rack mount case that needs to be painted and my old i7-2600 mITX system to go in it. It has Ubuntu server on it and I was thinking of running a few VMs on it to do various tasks.
The RPi is running Unifi controller for the UAP AC Pro and also PiHole.
I'm looking to ditch the ISP modem and maybe get a Unifi USG, then replacing the NetGear ProSafe with a Unifi switch.
Trying to build this rack with future proofing mind and keeping cost down is proving challenging.