Well copper is nice but Al, SS and Fe are nice as well. So get what you can and learn as you go. You will find your experience in your area is mostly what is needed.
If you are attempting to make this a full time thing then you need to contact businesses. Don't expect a yes the first time around. I was as successful salesman at one time. In my company the biggest sellers were told no 9 out of 10 times.
This is a tough gig, look professional, get business cards. Read the old threads on this forum the information is free and valuable.
You have no access to mtrs, plumbing and AC stuff yet because you just started. Mike.
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