Hi and good luck, I am not a breeder, just a loving pet owner for Schatzie.
I have a great friend who is a breeder. She has been breeding for years. She is licenced and USDA inspected so that is something you need to look into as you mentioned above about being licenced. Also, She spends plenty of vet visits, shots etc and her time is full caring for the kennels. I helped her a couple weeks ago with her kennels as she had some tooth surgery and was feeling pretty bad. I learned real quick from just one day's work that I could never have it in me to breed like she does. I never realized just how much work and money it takes to keep an honest, healthy, caring kennel up to par!! I was totally blown away and truly respect her for what she does.
Then she goes through the loss of puppies that don't make it, the unhealthy ones who need 24/7 care, the healthy ones too needing 24/7 care, etc. I am sure if my friend was here typing she'd give me a million other things about breeding that I have not mentioned.
I wish you the best in your adventures. I am sure if you do your research and plan it all out and take the time to learn all you can about breeding it would only be more of a benefit to you and the new puppy owners who purchase pups from you.
Wish you the best!!