Help Sage live!

My 6 year old kitty Sage has been diagnosed feline fatty liver syndrome, is one of the most common forms of liver disease of cats.The disease begins when the cat stops eating from a loss of appetite, forcing the liver to convert body fat into usable energy. HER LIVER IS FAILING, she has jaundice, her skin is yellow.  I don’t want to watch her slowly die or put her down at such a young age. The cost estimate is 2,500-4,800 !!! Unfortunately the method of treatment is several days in the hospital with a feeding tube and they refuse to let me arrange a payment method. Anything you can help with will help save hopefully get treatment. She doesn’t have much time left.