Good for you!!!
When I told my family, they freaked out. Not about the lap band itself (my sister had it done before me, in the US) but they freaked because I told them Mexico. They gave me such a hard time, I told them I canceled it. Then, I went anyway and took lots of pictures and videos and showed them after I came home. THEN, they were ok with it. In fact, the 2 who freaked the most (my mom and my neice) are now coming back with me for my first fill. So, it was ok, only after the fact for me.
I was so disappointed at how mad and upset my mom was. Because, like you, we are close too. I tried to tell her how much research I did, but she didn't want to believe it. She told me, they don't wash their hands in Mexico! My neice said thats the dirtiest and most dangerous city to go to, and my brother told me that you have to take someone with you because they don't dispense drugs at the hospitals, they send you down a dark back alley to purchase the drugs you need. And this all from people who supposedly have high IQ's!! I wanted to smack them all!
When I got back, I told them I had the best time and was taken care of better than at any other time here in the U.S. The Mexicans are so far ahead of us in this department, we in the U.S. should be embarrassed. The people there are so caring and nice, and what U.S. doctor would ever give you their cell phone number and actually expect you to use it?
So, you are very lucky you have such a great mom. It will make your trip that much easier.