BenMax, I was just about to ask the same thing.
Cathy, good for you for wanting to work with Jasper, but unfortunatley this dog sounds like he needs serious rehabiliation. From what you're saying, it sounds like he's displaying serious anxiety after being left for a short time, and that needs to be addressed by a proffesional. I know it's costly for training, but can you look around and find a behaviorist that will better be able to accomodate your price ranges?
"If you are a dog and your owner suggests that you wear a sweater. . . suggest that he wear a tail."
Vali (American Bulldog)
Artiro (Cane Corso)