The breeder I know will tell you:
You will need at least 1 male, and several females, look for at least a male from a championship line, females too if you can afford it. Be sure they are all of good breeding. DO NOT over breed your females. 1 litter a year is enough. Which is why you need more than 1 female if you want to be a breeder. All should be AKC registered.
Learn to give puppy shots and worming, how to remove dew claws and dock tails if that is the breed you choose, well worth your time to do so. Cuts the Vets bills.
And a big back yard where you can establish a kennel that is properly heated and AC. And a run for the dogs to play in. This is not an in your house type of business.
Thank you!