Looking for some opinions on what to start a new self-hosting journey on.

After being out of the game for a long while, I want to spin up an Arr stack w/ Jellyfin and/or Plex, pfSense (or similar firewall image), dashboard(s), Home Assistant and probably a bunch of other stuff I can’t recall right now.

I have a bunch of existing hardware I could use but just not sure what to put where and if what I have is overkill, outdated or just wrong for what I want.

• A Raspberry Pi 4 B (8GB)
• A 10 year old box I built in 2014 (specs in pic attached)
• A slightly newer box (circa 2016) but with a Corsair RM650x (2021) PSU and a slightly better E3-1275 V5 CPU

I also have a QNAP TS-453A (circa 2017) with an N3160 CPU & 8TB drives that I use as an NVR, my main storage, an iscsi target for my hypervisor VMs (ESXi but moving to Proxmox probably) and backups.

Anyway, the PCs have Intel QuickSync CPU’s for transcoding. At one point, I thought to buy a NUC to save on power consumption but not sure it’s worth the money just to save on the electric bill. The NAS seems slow to me and I’d rather keep my data and NVR separate from the Arr stack anyway. So, that leaves me with one of the two old PCs. Should I be thinking this way or have a I missed another option/setup? Thanks.