I'd say you should concentrate on training the dogs you currently have. Even if they are not typical sled dog breeds, they can still be taught to wear a harness and pull. When we lived in Alaska, the "strongest" dog pull competitor was a CHIHUAHUA. That dog outpulled the 150-200lb dogs when you did the math of dog's weight vs. amount pulled.
You need to realize how much time, training and MONEY it takes to actually maintain a real working team before you ever think of breeding. You might very well start into the training process and realize this venture is a LOT of work, a LOT of money and a LOT of time commitment which you do not have.
You can certainly mentor a show dog breeder, but they will have zero knowledge of a true working sled dog. You'd be surprised if you saw what is considered a Husky in Alaska. It is not a picturesque beautiful Siberian, or Malamute - the *REAL* huskies, including Mac River versions, are downright ugly and skinny funky looking mixed breeds. But they know and love their job and will pull 'till they die.