Even if *you're* "not talking how much it cost's to keep a dog, i'm talking about breeding", that still has to be paid, and don't forget that the dam should be a minimum of 2 years of age before being bred, so that's a minimum invested of $1700 (average costs is $850 per year) plus the original cost to purchase her. Some don't get bred until age 3 or 4, since they're busy with their show careers and sometimes the timing of the litter isn't right (people have LIVES, and when you have a litter, you can't go on vacation, etc.)
You've also left out showing the dam to her championship. Hard to put a price on that, can run anywhere from a couple of hundred dollars to a couple of thousand, depending on how tough the competition is and how far you're willing to travel to show the dog. And what if the dog is good enough to campaign as a Champion? That is thousands of dollars, even tens of thousands. Traveling costs (plane fare and taxis or gas for the vehicle, hotel bills, handlers' fees, entry fees, advertising) add up REALLY fast.
What about shipping the dam to the stud? Only a fool breeds just to local dogs. When you want the best, you have to go to the best, even if he's on the other side of the continent. That means shipping (depending on size of dog, anywhere from $500 to $1000 round trip) or taking time off work to drive her there. Of course, more and more people are relying on AI (Artificial Insemination), but that has collection fees, express shipping fees, and fees charged by the vet to do the tests to see when the female is most fertile and inseminate her. Probably not a whole lot of difference in price....
What about Sanction Matches? Handling classes? Obedience classes? Seminars? More $$$.....
Hey, I once flew out to California just to WATCH a Specialty show weekend for my breed. Seeing dogs in person is a whole lot different from relying on photos in a magazine, and I was particularly interested in seeing a few of the top-winning studs. Meanwhile, my own dogs got boarded in a kennel at home for 5 days--more $$$. And while I considered that an educational holiday, it's not something I'd have done if I didn't have show dogs.
I could go on, but I think now you're getting the drift?
EDIT:
"I also am not counting showing your dog, I'm just on about the breeding in general."
Well, you should have been more specific earlier then, when you said "i'm not talking about my pet dogs, im talking about other breeders in general". That INCLUDES show breeders.
If you are just talking about people who NEVER show, that is a whole different ball game. Yes, they would make money because their only incentive for breeding IS to make money. They use the most convenient studs (often have 1 of their own which services all their females). They don't care about the quality of pups they produce, just the $$$. We call those people Backyard Breeders. One step up from puppy mills.
BTW, just thought I'd throw this into the mix as well (for those who still think show breeders should be rolling in money): I know someone who spent a lot of money importing a top quality female Golden Retriever. Gorgeous dog, very quickly captured her championship and was lightly campaigned (took at least one Group First that I can recall). While awaiting being campaigned seriously after she reached maturity, she was doing obedience and getting her CD. Then came the fateful day at 2 years of age when the hip X-rays were done. Mild hip dysplasia. This dog moved as soundly as any I've seen, no one even suspected anythign wrong (which is why X-rays are necessary). No way she should be bred. She'd likely do fine as a pet as long as the owner didn't stress the hips (jumping etc.) She was spayed and sent to a pet home. Now, the dog's breeder did the right thing and refunded the purchase price. But the owner was still out shipping costs, maintaining the dog for 2 years, showing costs, handling classes, etc. Thousands of dollars spent, not a single thing to show for it.