ACL tear

Hello all! Im posting this on a few different threads so if you see this more than once Im not a robot! Just a concerned pet owner. Our boy Ace has been limping the past few days so we took him to our vet and turns out he tore his ACL. Ace is almost 110 pounds so his surgery could cost us up to 12 grand. We are leaning more towards the natural route in healing his knee and I just wanted to know if anyone has any advice/recomendations. Currently looking into a few different Brace options for him. Please let me know if you have expierced anything similar or have any advice. Thank you!!!