I don't know, but I have an answer anyway.
As far as I can tell, the funding and labor should not be arranged so as to violate the underlying regulation, which is:
"(g) Operating amateur-built aircraft. Operating an aircraft the major portion of which has been fabricated and assembled by persons who undertook the construction project solely for their own education or recreation."
The foundation of the regulation appears to be one of meeting the allowed motivations. Whatever the facts of a particular situation seem to show. So there isn't likely to be simple answers to your questions because there wasn't enough information to form answers.
I do know that the FAA does not seem to disallow "serial builders" - guys who build and sell, one after the other. They may even make some money for their labors. But so long as they are not making a living off it, however that is measured, it seems to be allowed. Enforcement of the regulation seems to involve more subjective judgement and grey areas than most regulations.