Who will need you to manage them, if they can manage themselves by themself?
This up for the point that one can both make his own products, and make money from it too, without any greedy "helpers"
Unlike China-US trade where OEMs can't do anything with American superiority at marketing, the brand value, and your "management" will mean close to nothing outside of USA.
There is a lot of design, engineering and manufacturing expertise in Shenzen that is unapproachable or unattainable in the US or Europe. Mechanical engineering, design for manufacturing, etc.
