Little cat with a big problem

We have recently found out that Katia( the cute cat you see in the photo) has cancer.I rescued her from the streets a few years ago but she has quickly become a part of our family.She still has some scars from the dog that attaced her.I have been rescuing cats and dogs with the help of our local vet for years now but Katia needs treatment and surgery in the capital city for her ilness. This surgery and the trip are too expensive for us because we have a big familly of cats and dogs and Katia's ilness is serious.I would have never thought that Katia will have to go trough another bad time after we took her.I don't want to lose that cat that was crying ,alone. Nor the Katia that wants to cuddle everyday. Please help her to have a long happy and peaceful life.