Mexico, schmexico. If you have any complications your local doctor will blame you for going to any doctor who is not him. They're arrogant that way.
The hospital care is BETTER in Mexicali than in the US. My husband was at the Cleveland Clinic in October and had to wait an hour after pushing the call button for a nurse or aide or anybody to arrive. (And they were surly about it.) There are at least two nurses, and aide as well as liaison nurses to care for the maximum of 7 bariatric patients in private rooms. I never had to push my call button because someone checked on me every half hour. At CC, my husband was crammed in a room with another man. The place was noisy 24/7 with bellowing staff, the halls were filled with smelly dirty laundry and trash bins. (And this is supposedly state-of-the-art "world renowned care") Mexicali Bariatric Center was QUIET, incredibly clean and the staff was incredible kind. Each private room with full bathroom has a 9' leather couch for your family member to sleep if they want. I wish they did plastic surgery there because I would go back in a heartbeat. But I understand it is hard to convince family. Perhaps if they watch some of MBC's YouTube videos?