I’d love to buy one of these.
I would doubly do so if the design were open-source.
I would triply do so if I could have all my new home appliances this way. I tossed my last fridge and my last washing machine over parts which would have been in the single-digit dollars to manufacture.
If the author is not commercializing this, the design and instructions should be open-sourced (and, ideally, advertised to a Chinese discount company).
Do you need to provide the documentation to the discount company? I was always under the impression the best way to get a product made was
a) make a compelling video
b) post to a crowdfunding site and make a lot of PR noise elsewhere
c) wait for the knock offs, if it takes a while, write up some posts about how you're having trouble finding production partners
d) if the knocks offs are decent, send a good knock off to the backers, otherwise refund their pledges.