Patches urgent ACL surgery!

Hi there, my name is Courtney and I’m in desperate search of help for my 6 year old family dog! She suddenly started limping, we took her to the vet and were told to at she has tore her ACL in her back right leg! She requires a very expensive surgery that will cost minimum of $4500 just for the surgery! that does not include x-ray costs, exam costs, aftercare, medication, possible Physio, etc. I am currently expecting my second child and am due late January, I nor could many people afford a massive amount of cash up front like what is needed to care for my poor girl patches! We have had patches since my son was two years old, and my son is now eight. She is our well loved family dog. And we have no other options but to seek assistance with this unfortunate event! Please, if anybody can donate anything so I can get her the help she desperately needs. It would be greatly appreciated. Patches was a rescue from a place that was trying to breed her, but couldn’t due to her severe allergies. Therefore, she was placed with us. She came to us in rough shape and has come a long way and deserves a second chance at happiness and love. Please if anyone can help us it would really help! My son loves his best doggie friend as do I. Thanks in advance !