Chester needs help

Hello my name is Erin and this is my baby Chester. I met Chester 6 1/2 months ago when my eldest doggo passed from old age and so we respectfully waited a few months before we found him from a breeder. he is a golden retriever/ German Shepard mix. He's very loving, outgoing, and too intelligent for his own good. on September 20th, I was running my parents on a doctors visit for an on going medical problem and other various errands. As I was helping my mom out to their car, I had Chester go outback for a minute but within that time he had taken himself swimming like he usually does and I couldn't have him come in the house soaking wet so I assumed he'd be alright. hindsight I probably shouldn't have done that. I arrived back at my parents  2 hours later and he had chewed through their hollow core back door ( it was maybe a 2ft opening) and got himself stuck trying to get inside to our female jack Russel. don't worry the door is now a steel door. the damage was already done though since he cut off the blood flow, we took him to the vet immediately after the incident and they had initially told us it was an edema and that it had to drain, but a day later I started to notice a cut/wound on his back right leg and so we took him back to the vet and they shaved his lower half and that is when we all saw the real damage. There was dead tissue that needed to fall off all over both of his legs and up his back. it wasn't looking too good. The dead tissue on his legs were the worst. The vet wanted to keep sedating him so they could clean the wound. But every time they did, the updates on his health kept getting worse. Its gotten to a point where the right Achilles tendon is gone. The left Achilles is still questionable. The good news is that the necrosis has stopped, blood flow has returned and the tissue is starting to regenerate. So he wont have to have either leg amputated, as we have been coordinating with a company out of Colorado with our vet.  the compony is called Orthopet they make high tech 3-D printed carbon fiber and plastic braces and prosthetic devices for dogs and cats. it is amazing because it will restore him to a normal quality life where he will be able to run, swim, and play like a normal dog, he will truly be a bionic dog. the devices run between $850-$1250 per leg plus they have to make fiberglass casts of both legs at $500 each.
we still have several weeks of wound maintenance and dressing changes every other day at $300 per visit. he is in temporary splints so he is able to stand and walk with difficulty. this baby has so much will to live that he is doing it and we are having to limit his access to the whole house.
please help he is a young dog that deserves to have a full life, his vet is completely on board, dr. Frasier and the staff  at Alta vista here in phoenix, AZ have been amazing. 
Every life is precious. your donations would be greatly appreciated we are creating a Facebook page for Chester so we can post updates about his progress as he recovers. we are committed to this but when its all said and done it will cost between $10,000-$15,000 and he is worth every penny. 
Thank you for reading and again your donations would be greatly appreciated thank you. his legs four nights ago. ( his right leg is the upper leg in the photo)

* Update 10/01/18*
We just got home from the vet tonight and we found out that there is a vet specialist coming up once his wounds have fully healed to do the casting for the devices as she has extensive experience and a fantastic reputation with successful outcomes with the Orthopet product. Chester is making good progress with the wounds and his vet expects to see major improvement within two weeks, and says that Chester will be ready for casting within about 4-6 weeks. We have included a photo from tonight's visit when they were wrapping his legs. (when he was about 5 months)
this was when the necrosis was declaring itself.