I received a medical loan through Care Credit for my $14,600 bill. It is 0% interest for one year. Worth looking into if you can make the payments to pay it off in a year.
I have noticed a significant drop in our grocery bill since I started this journey and while I won't save $14K the first year there alone, I know that over time it will be much, much larger! Plus, all my co-morbidites are gone....no snoring, lower blood pressure, diabetes, etc. That will save me money on prescriptions!!
As for weight regain...everything in life is what you make it. If you go into this with a positive, can-do attitude, then it will be a great experience for you. Do your research in all areas and make your decision with a clear heart.
Good luck in whatever you choose!