I would never let a dog go with a torn CCL because it is painful and arthritis begins very quickly. It also puts them at a higher risk for tearing the one in the other leg.
Here is a link that might help you make a decision:
Yorkie Haven Rescue - Cranial Cruciate Ligament Tear Info
Also, I would not have anyone do that surgery but a board certiified surgeon. You can find one at
American College of Veterinary Surgeons
Good luck and keep us posted.