First ask yourself, "Why do I want to raise puppies?" And be honest with the answer.
No breeder who gives a litter of pups the proper care ever makes money, no matter how many pups are in the litter.
You love Labs and the pups are so cute?
Fair enough,but will you think that when you are up at 6 in the morning cleaning up the urine and poop that 6 or 8 pups have deposited overnight? Or will they be that cute as you write the check to the vet for their wormings and innoculations? Will you still think they are cute when after 10, 12 or 14 wks. you still have 2 or 3 pups available (over and above what you decided to keep for yourself?) and the phone has stopped ringing?
Have you had your yellow male's hips and elbows x-rayed and certified by OFA to be free of hip and elbow dysplasia? Have you had, and will you continue to have, his eyes examined yearly by a Board certified veterinary ophthalmologist to be sure he is free of hereditary eye problems?
Have you trained him for any sort of competition.....conformation, obedience, hunting-retriever tests.....shown him to prove he has qualities that are worthy of passing on to the next generation?
Have you read the standard for the breed? (see www.thelabradorclub.com)
Are you aware that the practice of breeding a yellow Labrador to a chocolate Labrador is avoided because it can produce a dog lacking in pigment (a disqualifying fault in the standard for the breed...along with 4 other points)?
Will you give a meaningful health guarantee on your puppies....and be prepared to back it should the pup be affected with a genetic problem?
Are you prepared to responsible for the lifetime well being of those pups you will produce? Will you be their for them when their new owners call one day and, for whatever reason, can no longer keep the dog and seek your help?
Learning to be a responsible breeder, even for only one litter, takes a lot of education....about the breed, about the genetics (color and health) of the breed, about general canine health and about raising and training dogs in general.
I would suggest you read several important books:
Reaching For The Stars by Mary Roslin-Williams
The Complete Labrador Retriever by Helen Warwick
The Versatile Labrador Retriever by Nancy Martin
These 3 books could be classified as "bibles" for the person considering getting involved in the Labrador retriever breed.
I would then visit websites of shelters and Labrador retriever rescue organizations to see how many unfortunate Labradors are in need of homes.....and then decide if you really want to be responsible for adding to the population of the (unfortunately)number 1 breed in the US.
If you still feel this is the road you want to take, I would advise you join several Labrador related lists.