Marilyn,
A service dog training organization is a great idea! I have a younger sister who was born with Spina Bifida. She had a black lab that was trained by a prison inmate. Was an amazing service dog. The organization that provided the dog required her to come to a three day "training camp" (along with about eight other service dog recipients) to meet her dog and learn to work with it.
As I recall, there was no cost to my sister. But I do know the cost to raise and train those dogs is significant. Several thousand dollars per dog.
I'll do some research in that area. Thank you!!
Randy