I want to give give you realistic expectations: Unless you spend well over $10K on hardware, you will be disappointed, and will spend a lot of time getting there. For sophisticated coding tasks, at least. (For simple agentic work, you can get workable results with a 3090 or two, or even a couple 3060 12GBs for half the price. But they're pretty dumb, and it's a tease. Hobby territory, lots of dicking around.)
Do yourself a favor: Set up OpenCode and OpenRouter, and try all the models you want to try there.
Other than the top performers (e.g. GLM 5.1, Kimi K2.5, where required hardware is basically unaffordable for a single person), the open models are more trouble than they're worth IMO, at least for now (in terms of actually Getting Shit Done).