Surgery for Nubbs a stray kitten

Meet Nubbs, he is a 3 month old stray that we noticed was injured. we were able to trap him. We planned on getting him to a shelter or rescue that could help since he was in dire need of medical attention. due to over crowded rescues and shelters they were unable to help. so we have decided to take on the responsibility and welcomed Nubbs to our family. 
   The injury was possibly from  a raccoon attack that severed all his toes on his rear paw. he needs amputation surgery to remove the whole leg.  I was able to get him to the Vet yesterday and get all his shots and tests done but unfortunately the surgery will cost $1800.00. they want to do the  surgery as soon as possible due to fear of infection.

I am asking for help from all the animal lovers out there to please help us get Nubbs the surgery he needs to have the life he deserves. every little bit helps!