Very insightful, Russ. Thanks for your input. It's hard to develop a good reputation but easy to damage one. While I can certainly appreciate someone's desire to become a professional builder, it's in one's own best interests to take the time and be sure that you truly have a worthy product to sell.
There's also the importance of having some business acumen. If you start selling instruments, you are running a business as well. That means accounting, dealing with both happy and unhappy customers, trying to make a profit etc. For some, these sorts of things can take the joy out of the process of guitar building.
Regards,
Rob