That is really just breeding then. Say you have 7 pups, and that you can get 1000 from them. You would have too pay 1500-2500 for a solid stud to get 1000 (that is if your bitch is well breed). Plus you will spend 2000.00 on all the care products, vet bills..ect.. so you are luck to take home 3000.00 That is if you sell them all at full price, which can be hard. Doing that once a year is not really a business.
In the end there are only two ways to make a successful pro Kennel. One, is prove yourself to a point where you become a brand. That will require multiple championships at one game or another. You can call that the Lardy way. He maked money on training and devleoping dogs and transitioned it over to books, seminars...ect.. the second way is to develop a brand. This take alot of money.You have to produce good dogs, have very nice grounds and advertise like hell. The Is kind of the Wildrose way. They make there money on selling dogs. They have 5-10 bitches and sell pups to the high end hunter/amature. You have to advertise in amgs like retriever jounral and double gun...ect... this takes thousands up front.
In the end there are only a hand full of kennels, what maybe 100-250 in the country where the owner makes good money. I am talking out of my butt but I think it is a good guess. There are more then 1000 full time kennels and I would bet that only 10% of them make more money then they could make doing something else.
I agree with the above, train and work you dog because you love them, breed them because you want a pup out of you current dog or if you just think it would be fun. Along the way if you make some money to off set some of your expense great. Also picking a kennel name and breeding and naming your dogs under that name is kind of cool. Especially when someone else carries that name one with one of your pups. So do that.
Also starting a formal business for that kennel can be a nice tax write off. You have to be careful but if you get a business license and keep records you can write off money you invest in that business. Say you spend 8,000.00 and only make 3000.00 on the litter. Then you can write off the 5,000.00. Again, be careful. Try to write off to much or to often and you will have IRS issues.