Please help us save Ella!

Hey everyone. This is our family kitty Ella. The other day she was hit by a car and her right knee is destroyed and her left knee also has damage. We have already spent over $1500 on vet bills and she still needs surgery on both knees. Our funds are starting to run low and the cost of surgery is $6250.00 give or take. Me and my children love our kitty and we do not want to lose her but if we can't come up with the funds then I am afraid we will have to put her down due to quality of life. Please help me save Ella .