It's still pretty rough to selfhost an LLM. You can get one that's kind of okay on an average computer, but to get a really competitive one running locally at a good speed, you need a huge amount of RAM that is still beyond most average users (VRAM for GPU based projects).
I've been trying to get Vicuna going and the RAM usage is rough, 60gb is suggested, and I've got 64 and I think I need a lot more honestly.