I don't know anything about having surgery in Mexico or the financing there. I have done no research on medical technology and federal programs in Mexico. Surely there is some sort of Agency for the medical field, but I know nothing about it.
I'm not sure how far you are from the surgeon, but something to consider is post op care and band fills. I'm 75 miles from my surgeon, and for me, that means I will have to take off work at least 1/3 - 1/2 a day for each visit. If you take in consideration anytime away from work, how much will you actually save by going to Mexico? My interest rate for the surgical loan was 1.9% annually. That totals up to about $ 173.00 during the term of the loan. My surgery, doctor, medical evaluations, fees, edp, program fees, hospital fees, all inclusive was about 13,000.00. In the long term, I'm hoping for a return on my money in the form of lower insurance premiums, lower medical costs, lower medical perscriptions....etc.