Have you done any of the health screenings for these conditions that occur in your breed? Particularly hip dysplasia? Dogo Canario Club of America -- Health
Are you committed to being a responsible breeder, which your breed's club lays out here: Dogo Canario Club of America -- Guide to Breeder Selection
and also explained in this thread and the links within it: https://www.dogforum.com/new-addition...reeders-88226/
Have you read through this article? Dogo Canario Club of America -- So you want to be a breeder? Page 2
Have you successfully shown or worked him in any venue? What specific traits are you hoping to produce and what are your goals for breeding? How will you evaluate what females he will breed to? Are you willing to be responsible for every puppy produced for their lifetime, like taking them back and/or rehoming them, in case the female's owners can't?
Being purebred, registered, and having a good bloodline do not necessarily make a breeding quality dog. Having a "good temperament" is only a part of it as well. You need to be dedicated to keeping the puppies out of shelters and out of the hands of bybers, you need to make sure your dog is healthy through more than just a vet check, you need to make sure your dog is structurally correct for his breed, you need to make sure he is competing, showing, or working in some venue and doing well at it, etc. If everyone bred their "pedigreed dog with nice temperaments," pet overpopulation in the US would be even worse than it already is.
That explained, if you've done all that it takes to ensure your dog is actually breeding quality, to determine the stud fee, find out what the owners of similarly qualified dogs of your breed charge and then reduce it considerably. You have no idea what your dog will actually produce yet, and if money isn't a concern, which it shouldn't be, it doesn't really matter what you charge. A good place to start would be your dog's breeder--if it was a responsible one (and if not, I'd be looking even harder at your dog to decide if he should be bred)--in fact, if you got your dog from a responsible breeder, said breeder should always be willing/able to help/support you with any of your questions/endeavors.