Urgent Help for RiRi's Specialist Treatment

Hi, my name is Sam Marshall and this is my cat RiRi. We adopted her and her sister when they were a month old from the humane society and they just celebrated their first birthday. Around a month ago RiRi started to lose patches of her fur around her neck which started out the size of a nickel. She continuously scratches it and it has lead to this spreading from her neck to her back and above her eye. It has gotten so bad she can’t open her eye and her neck is entirely bare and bloody from the scratching. We have taken her to the vet multiple times and during the last visit they informed us there was nothing else they could do and she would need to be sent to a specialist to get a diagnosis. I am currently in college at WKU and work 30 hours a week on top of my schooling, but do not have the funds to take her. The Nashville Veterinary Dermatologist had an opening for this Thursday September 12 and said she was an urgent case. I would appreciate any help that could be given or even just prayers that my baby will be okay. I can’t fathom the fact of having her sister lose her best friend and also my best friend. Thank you for everything in advance.