What country/region are you in?

In the North America, I’d recommend Novelkeys, Omnitype, Mekibo, Cannonkeys and spacecables (spaceholdings) for GMK sets

A better approach is to keep your eyes out on Geekhack. The majority of keyboards and keycaps go through an interest check there, and then the designer announces all regional vendors/prices prior to a groupbuy.

+1 for Jellyfin. GPL licensed software so nice.

If your on a budget, an older Thinkpad is a good choice. I picked up a X220 with a charger and spare battery off of Craiglist a year ago for $60.

Ended up going with Coreboot with a SeaBIOS payload and Debian OS.