[lostlogin]

Synology 918+, (and presumably the very similar 1019+ and 920+) is great for this - at a fairly steep price. It really does 'just work'. I added more ram to take it to 12gb so that the containers had plenty of headroom.

[atomi]

Arm processors are more energy efficient.

[novok]

Most synology NASs run similar software, so you can buy an ARM one to do something similar.