I just stumbled on a framework from an MMA champion that describes exactly why mastermind groups work.
Frank Shamrock called it Plus, Minus, Equal.
You need someone better than you (Plus).
Someone at your level (Equal).
Someone you're teaching (Minus).
The best business operators I know look at business as a puzzle. They know the numbers, the challenges, and operations inside out. They can see how it comes together like a picture on the box.
There are plenty of manufacturers that make small and relatively cheap maker devices and chips. Claude Code is *excellent* at programming them into whatever device you can dream up.