You and me and few other guys on this forum are not going to create a viable production line overnight.
It doesn't work that way. VMC didn't "created a manufacturing line". They are using the same exact manufacturer HF used, paid them, and magic comes out of that. As simple as that.
You only need money. You need money for the pcb (that is the longest lead time component and that we should then pay asap), you need money to order the components, you need money to place the components, you need money to program and to test the boards, you need money for logistics, etc.
One does not simply walk into a board manufacturing company and say "those... right there.... I want some of those" - VMC produces the boards under license, most folks don't have that license.