Is it worth going to Mexicali to get a breast lift?

While there are many excellent surgeons in other countries I would strongly advise to have your surgery within driving distance of your home.

Why:
1) Pre and post operative appointments
2) what happens if you have a intraoperative complication? What medical care is a available is available? Will your insurance cover the complication? Who pays if you required a air ambulance to be brought home?
3)What if you need a revision?
4)it’s best not to fly for several weeks after surgery (pain, blood clots, etc).
5)price should be only one of the factors… The savings could be more based on
air flights, lodging, travel time, inconvenience especially if a revision would be needed.

I suggest you make several more appointments with experienced Plastic Surgeons who have in office financing options and who are not only Certified by the American Board of Plastic Surgery but in addition ideally a member of the American Society for Aesthetic Plastic Surgery (denoting by membership as having met additional criteria and a focus on Cosmetic Plastic Surgery).