

My preferences are quite different.
You’ll need a lot of RAM for all the containers, 64 GB is nice. A CPU that saves power when idle is fine. You’ll need at least 16 TB storage (32 TB RAID1). SATA HDD is fine, when you have ZFS and cache using SSDs. Never use USB for drives.
It does not need to be quiet. Just put it in the basement and close the door.
I run Netbox for documentation only. But your approach is what I actually wanted to do, if I just had plenty of time.