all of the dirt pedals for Shenzhen Grand Technology who have handmade pedals made for many brands in China.
As such he has through them manufacturers and/or access to parts at wholesale prices to make his own brand if he wishes to sell to supplement his income.
This is for example what Electro Harmonix do. They design the pedals in America but the entire boards are sent as finished product to their NYC factory to be carefully inspected before being built into the enclosures. It is how they keep the prices down but the quality and reliability up