Jax the Rottie's Surgery

This is really hard for me to do, but we need help for our Rottweiler, Jax. He started limping recently and after a vet visit we were told he has a partial ACL tear in his rear left leg. His surgery is quoted at $1,900, which is money we just don't have. My husband and I don't have children yet, so he is our son. I even tell my parents and my husband's parents that he is their grandson. The thought of him being in pain or having one less leg is devasting to us and would break our hearts. Please help us.