If you are getting this down to the little expenditures, you may want to rethink.
Breeding ALWAYS costs more than you think it will, no matter what. There are ways to cut corners, but it is a costly endeavor and will run you into the ground if you are on the bubble.
I think your best bet is to start by getting into areas related to breeding. Start with training and showing/trialing your dog.
Are the females adults or puppies?
Do not worry about a dog, you can pay for a stud fee, best match an excellent dog to your bitch, and come up on top at the end of the year by not paying for food, vet care, training, trialing, etc. for him.
If you are going for a puppy, know that they are a crap shoot. Best pedigrees, promising in the litter, may not have good hips or elbows, or may grow to large, or may not have good temperament, and you then have a bitch, and need to start another.
For an adult bitch, you will want to evaluate her, her temperament and conformation, any training done, is she a kennel raised dog, hip and elbow ratings, titles, etc., as well as pedigree.
And even then, once you have a started bitch, if that is the way you go, the best bet would be to get her into training of some sort and build a bond with her, while gaining the knowledge, of some dog venue, obedience, schutzhund, tracking, herding, agility... Something that gets you around the people who are very into dogs.
Join some breed clubs or training clubs and get to know real live people.
Another thought at this point, as you have rescued dogs before, consider rescuing a pregnant bitch. That will give you awesome experience, and working with the rescue to place the puppies will give you good experience screening people as well.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.