How about another different take on the question. Could OP approach this as a cottage industry thing, assembling wheels at home for an established wheelsmith like Psimet (just an example, there are many) or a local bike shop? Maybe he could get some training in the builder's shop, if he has the mobility to allow that. Then assemble wheels that have been sold by the builder or LBS to the established specs and ship them out from home. Bye and bye OP may have the expertise to go out on his own. Baby steps.