Breeding a litter is not cheaper than just buying a puppy. The female must be in top notch health and kept that way...as well as the male. There are vet visits after birth and then tail docking and dewclaws. And, if something goes wrong, the cost rises dramatically. Plus, what about the rest of the litter?
Breeding can change a male's behavior. But, just being in tact will do that. I recommend having him neutered. It will help with any current or future aggression or marking behaviors and eliminate the risk of testicular cancer.
I also agree with the previous poster. There's plenty of dogs that need good homes and plenty of excellent breeders already out there.
Good luck!