After some planning I came up with the idea of making audio amplifiers for my business. I got no problem with making the circuit design as I am a electronics hobbyist, but I stuck here at the production part, there are many things that I can't build at home (like the chassis), even if I can I gotta make equipment. I am on a low budget I can get to production companies as they don't intend to take small orders. Also I don't even know any of them. Also I can't get many materials that I need to make parts, like I can make pcb at home but can't get the solder mask at small quantity. What should I do?