See if you can get a used Quadro P4000 from someone local to you (eBay in the US, for example). I got mine for about $80. It’s basically just a GPU for video encoding, but it’s done a fantastic job handling everything I’ve thrown at it, and it’s a huge upgrade over a CPU.
You can also post on the c/selfhosted@lemmy.world community (I hope that link works! Here’s another if it didn’t)
keebio has some good options for affordable split keyboards