I've just set up a node. An Intel NUC from eBay, a 1TB SSD from eBay (in hindsight I should have bought a 2TB one), already head a usb keyboard and mouse and an HDMI TV, but it's going to be used headless and via SSH. Total spend under €140.

I've installed Ubuntu 22.04 LTS, Bitcoin Core and electrs. Bitcoin core synced in under 3 days.