Sorry to hear about all the problems you've had and money you've had to spend. Some things I don't think a person can budget for, they just happen.

I am surprised that the classes didn't require a Kennel Cough vaccination prior to attending. Around here all most all OB training/classes/groomers require that vaccination (as well as others) to qualify to attend and have to have a certificate from the vet to prove it. The few we have that don't require it we never recommend to people.