Help with Auggie's Brain Tumor Medical Expenses

Hey friends . As some of you know Auggie has been struggling. He has a tumor on his brain. It’s located near his cerebellum and brain stem on the left rear side. This started months back as an ear infection diagnosis which would not go away. After his annual visit plus 2 visits he still was having balance issues and tilted head. It just seemed to get worse . We recently went to LA and when I got there I was lucky to find a vet and got a 2nd opinion . She told me that no ear infection was present and strongly suggested I get into a neurologist vet ASAP.
Luckily she was able to refer me through her veterinary system to a good neurologist who ran all tests( MRI, Xrays, all blood work. )
The results of the scans came back quickly showing the tumor. I then needed to locate a oncologist/ radiology vet in Chicago which was difficult due to limited places and time frame .
We are racing against the clock. I located a place through a friend called PetCure Oncology. It’s in Glendale Wisconsin outside Milwaukee. They have been fantastic. Got the scans and the next day sent me a video of the specialist going over the scans in detail and her recommended course of action. The good news is he has a great chance at life . The bad news is these procedures are astronomical and I’ve already piled up huge bills up to this point. He is my best friend in the world  and  it’s breaking my heart watching his struggle. I’m racing against the clock. I’ve got him scheduled for his final Catscan next week  before moving forward with the radiology .
He is young . 5 1/2 years old and strong which is good.
I love him and need to get him better.  Friends 
have been so great and supportive. Those with
pets who have been through this know it’s hard.
It’s humbling reaching out but its my only option.
Those of you who know Augs, know he is a great 
dog who loves everyone he meets!
Thanks in advance and bless you all!