Surgery for Bowie

My best friend is suffering. What had begun as just a bit of pain in her neck has evolved into the paralysis of her two back legs with her front legs showing signs of atrophy. Without a very expensive surgery, the veterinarian recommends euthanasia. This is out of the question, and I'd like to try every avenue of assistance before succumbing to grief and hopelessness.

As of right now, I'm not working in order to care for my terminal father and occassionally my grandparents and as a result money is extremely tight. Her name is Bowie, she's turning 3 in a couple of weeks and she's the only thing that keeps me going. I'm reaching out because I need help. I lost my grandmother only two weeks ago and soon anticipate losing my father as well. I can't lose my dog, too.