Hi there, I have build a nice backup NAS recently:

Supermicro X11SCL-IF 16 GB ECC RAM 2666 Intel i3 9100T M.2 512 GB System Disk 4x 8TB Ironwolf 5400 RPM Fractal Node 304 Case Be quiet Pure Power 11

This is around 40W @the wall with all disks spinning and has Intel quicksync for decoding. My use case is mainly backup, you should consider i5 for hosting more apps on it. The processor was 30$ at eBay but is quite low power and has ECC support without being a Xeon processor. The newer generations of i3 do not have ECC ram from the spec. The board itself was 300€, but wanted ECC ram. The case is well cooled what ist most important for a system running for a long time. You should also consider N100 mini computer in addition to have more flexibility in the long run for different application demands.

Hope this helps for decision making

Arch on the Desktop, Debian on the servers for peace oft mind.

Have a look to Netcup provider. They have easter specials coming up! I have three servers running there for longer time and am really happy with it (vps + root). But i am located in Europe, don’t know if speed in US is okay…