Here are my thoughts, FWIW. I know little about breeding, genetics, or the business end of things.
If you want to really make a business of it, you have to get all the certifications/licenses taken care of. What are they? I have no idea. But you don't want to go to all the work and expense, only to have someone take it all away because you didn't dot your i's and cross your t's.
Do you have a way to fund this endeavor? Start small and grow? Can you afford to do it for a year --or more -- without it turning a dime?
I have gotten chicks from a breeder only once. I have to say I was not impressed with her, and I don't think I'd get more birds from her again. Why? A few things. Not returning calls. I had to wait about 20 minutes at our meeting spot, which was on her property. I was on time, and had driven 115 miles to get there. One of the chicks had pasty butt. (Yeah, that happens, but clean it up before you sell it, duh.) Why did I buy from her? She had the birds I wanted, and I could buy just a few, not 10 or 15. That was the only reason.
The above experience is something you don't want people to have with you. I'm not giving her name because others have spoken highly of her, and maybe I just had a sub-par experience.