Save Saki The Kitten

She is 4 weeks old. She was found apparently living up at the car dealership and she and her sibling were hit by a car. Her sibling died.We took her to Animal Medical Clinic on PW Rd. Her femur is completely broken. They said because she's so young, it has a good chance of growing back together.The vet called the orthopedic surgeon and is waiting to hear back from them. It's going to $1000 to fix it but we can't afford it. We're going to name her Saki because it means blossom of hope in Japanese. Any help would be greatly appreciated.