From what I can see it doesn't look too crazy at first glance. It doesn't seem to have any especially rare or expensive parts or features. A few complications,

From what I can see it doesn't look too crazy at first glance. It doesn't seem to have any especially rare or expensive parts or features. A few complications, but that's about it. Very rough guess: $100 BOM for a few thousand units? I reckon it's doable, but very risky. There's clearly an awful lot of work in this, so the engineering costs aren't going to be trivial. You need to sell a few thousand of them at that $250 price point to break even. On top of that, at this price point it is a luxury product. This means customers expect perfection. You can't afford any kind of QA whoopsies, and especially with a machined metal case it is a recipe for disaster. Small DIY keebs are quite doable. Mass-produced keebs are quite doable. Boutique designer ones? Cutthroat market with zero room for errors. Stay tiny, grow huge, or go bust.