I've replaced the cloud AI with 2 DGX Sparks, and I have built a specialized harness for the TS stack that I professionally work with.
The harness was initially built to lift the quality of Qwen 3.6 27B, and then I expanded it to any model out there.
As many here have said, harness is critical, and it can do wonders to your model if you do it right. TSForge, the harness I built IMO, is the best harness on the market for writing full stack TS apps, as I have incorporated all the best practices, tools, etc. surrounding the stack.
If you don't believe me, give it a shot for a minute, I have no doubts that you'll agree.