I am sure your cocker is very cute. You should post some picture so we can see him
On another note, breeding dogs is a very big responsibility, that is, if you want to do it ethically. It costs a lot of money, and takes a lot of time. If you want to be an irresponsible breeder and creat more dogs just because your's is cute then I am sure you could find an inexpensive way to cut corners.
Please keep in mind that if your dog is neutered he will have less behavioral and health problems and you will reduce his risk of testicular cancer to zero. If you leave him intact, you also run the risk of living with a dog that urinates in your house when he reaches maturity.
If you want to breed your dog responsibly and for the right reasons then you need to compete with him. He needs to be evaluated by judges and top breeders to determine if he should contribute to the future of cockers. You can compete in the confirmation ring or work in the field with him, but either way his fate with breeding should be based way beyond "cuteness."
Some things to consider:
All breeding dogs should at least have the following,
1.) Be titled in some area of competition
2.) Be tested for genetic problems and disease i.e. OFA, CERF, Cardiac etc.
3.) Have stable temperaments that are true to their breed.
4.) Be tested and cleared for brucellosis.
Have you thought about if he is carrying any genetic problems that could be passed to his puppies? Are his patellas good, is his heart strong are his eyes clear from disease? How do you know? Has he been tested? How would you find a female to mate him with? Would the puppies be sold on contract? These are all things that responsible breeders who care about the future of their breed take into account.
I am sure you don't want to produce more puppies that end up in shelters. Dogs should be bred for one reason - to better their breed. Breeding a dog for pet puppies alone is not a good reason to breed.
I just recently added up how much it will cost to breed my bitch Alice next year. After the stud fee, progesterone testing, surgical AI implant, ellective c-section and post-partum puppy care I am looking at around $3000. I guarantee you it's cheaper to neuter your dog, even if he is the male and not the female!