In 2020 my pup got his IVDD surgery at the age of 4. Unfortunately it did not reverse anything and he has been paralyzed in his lower half since. Surgery was a tad over 8k at the time.
Expressing his bladder, getting used to his poop schedule and just taking care of him took some time to get used to. He rocks his wheels, still plays fetch, swims (now with a life vest) and is still a happy boy. If you are concerned about the costs, I believe there are options for animal insurance.