And I'm mindful that you have space constraints, otherwise the cost of a six-year-old gaming rig would be reasonable.

Last night I was looking at a $100 RISC-V SBC and plotting how I could get a real graphics card onto it for my container-cabin. There are mini-PCI adapters, but powering it would require a beefy external supply. And I don't think CUDA for RISC-V is a thing yet :(