I went thru TPLO with my old mastiff. She was not quite 8 months old and around 120 lbs. and tore her ACL. Surgery went reasonably well, we had an ACVS vet do the surgery. The first month was a pain in the neck, as she was young and wanted to get moving. She did always have a limp afterwards, but not enough to keep her from taking a daily walk, growing to 240 lbs, chasing squirrels, or from working as a therapy dog with children. Fast forward 7 years, she developed bone cancer at the surgery site. From what I've learned since, the cancer may have been caused by the plate installed with the TPLO surgery, or from her young age and cutting thru an active growth plate. My neighbor went thru the same thing with his medium sized dog about a year after. His dog did not bounce right back, he took nearly a year to resume regular walking and such. Additionally, his dog ended up having the plate removed, but now is taking regular walks and chases rabbits.
I would do my homework and check on vets in your area. We got 3 opinions. I would also check on the outcomes for their patients. The suturing is rarely successful in dogs over 50 lbs. TPLO removes the need for the ACL by removing the angle in the dogs knee. This makes their knee geometry more like a humans, somewhere around 90 deg. The angle can be checked by careful x-ray.
This in not inexpensive in time or money. I wish you and your pup good luck.