I think it might be worth starting with pure mechanical simple goods, and working from there? E.g. Specialised bbq tongs might be an easier entry point, allow

I think it might be worth starting with pure mechanical simple goods, and working from there? E.g. Specialised bbq tongs might be an easier entry point, allow you to build up the machinery, drills, laser cutters, mould injection equipment, etc. Putting the electronics aspect aside for now will mean you can get things to market now, rather than that extra level of design, QC, legislation etc. 0-to-toaster is a big jump, and we wouldn't attempt a monolithic deliverable like that in software-dev...