There are so many avenues for getting information with books, internet sites, and yes, even asking experts that I don't really think asking the general public on a question and answer site like this shows any form of research has been undertaken.
Dog breeding is an art, and can be heartbreaking, expensive and time consuming. Many people think you just need a bitch and oh yes a dog from up the road and voila you have a money making scheme.
As divegirl says, this is why rescue centres are so full and the free ads are full of litters being advertised. Some of us take pride in our breeding programmes, studying pedigrees and travelling hundred of miles and spending hundreds of pounds (very little if any of which can be recouped) showing our dogs and visiting prospective studs with our bitches. Joe Public comes along and thinks they can make money just by having a litter with little or no thought given to how they would cope if all the puppies were returned to them by the owners because they could not cope, or how they would feel if they lost their precious pet during a difficult whelping and how they would pay the vet bills if a c-section was necessary and maybe ending up hand rearing a litter.
I am afraid I am long since past caring whether I offend anyone or not. At least one person on this site was sensible enough to decide that breeding was not for her, and she took our advice in the best possible way.
Sadly I suspect that many others will not.