Rescued kitten needs surgery

My cat, Cheeseburger, lost half of his tail before he lived with my family. We are not sure how the tail was lost. We rescued him from living out in the cold and he is so thankful and snuggly. However, the vet says he needs surgery to get the rest of his tail removed because it is infected, which is more than we can afford. Any amount helps as we have grown to love our new family member.