I don’t know. I questioned her on that and she claims they live longer than some giant breeds? Right now the dog is 3 yo and is having lameness issues so it might be a real short career. They can’t figure out the problem. She currently is seeing a canine physiatrist vet. She does kind of need that size of dog for a balance/mobility dog as she is a larger person.
I know getting a dog from a service dog organization has a long wait. My friend has easily spent more than 15-25k on the two dogs. She did extensive SD training ($$$ with both dogs) and still does multiple classes every week to keep exposing her dog to other dogs and lots of different situations. The Leonberger is also a certified therapy dog. My friend used to ride but had to quit due to health issues and now trains her dogs nearly full time (she is retired).
As far as Rackonteur’s situation. I think the owner will have to crowdfund if they can’t afford the surgery (after they inform the breeder of the issue in case they would take it back). If it were me, I would be darn sure what the surgery entails and what the rehab process will be. Possibly a second opinion. However, we really don’t know enough about the dogs condition to know. A service dog that can’t walk is not a service dog.