[yorkiemini]

Cali is a Service Dog and a Therapy Dog.
Just as an FYI - Therapy Dogs are not considered Service Dogs - ADA makes a clear distinction.
And, yes, it is quite expensive to get training for a Service Dog, but if you can prove a disability need there are some foundations that will help with the cost of getting a Service Dog that is trained, but most will not help with training a dog you already own. Part of the reason for that is that it takes a long time and the dog has to stay with the trainer for this, not at your home. After the dog is trained, they then train the new owner.

Not impossible to get your dog trained, but it will be expensive and time very consuming (i.e. may be lots of travel and motel living). Of course, this depends upon whether there is a training facility near you that will take you and your dog.