I agree. Please do your research and be wary of any practice in Mexico that charges less than $4600 USD.
Ask for certifications and accreditations for both the Surgeon and the Hospital. These are fairly easy to confirm online. Look for surgeon accreditations like FACS, ASMBS, SRC Surgeon of Excellence and SRC Master Surgeon in Metabolic and Bariatric Surgery.
As for the Hospital. Make sure it is a FULL-Service Hospital and not a clinic or surgery center. Clinics and surgery centers are not equipped to handle serious complications. Their accreditations and certifications include SRC Center of Excellence in Metabolic and Bariatric Surgery, as well as Local, State and Federal certifications.