Something went wrong with my facelift and my jowls dropped completely 5 months later

Revisions are part of plastic surgery. Most surgeons have a policy for revision will surgery and should be reviewed prior to the original operation. $15,000 does seem like a lot for a facelift and I personally would charge the patient nothing more. That's a personal issue and not necessarily what your own surgeon thinks is right and proper.

The costs related to your revision surgery really depend on the surgeon, and usually it is determined on a case by case basis. Before proceeding with any surgery next time, you may want to get the full details on what you'll be charged if revision surgery is necessary.

It sounds as a you have a good relationship with your plastic surgeon which is very important.  Please understand that the surgeon has many expenses which are required for a revision facelift.  In my experience it is common for good surgeons to perform a revision facelift and not charge a professional fee but to charge a facility fee which is usually in the range of $1500-$2500.