A couple of things:
Lap-band prices in America range right around $10K (at least from what I have seen/heard), so your cost in India is pretty close. I know my surgeon (in TN) recently started offering the lap-band for right around $10K.
There is a great (if you can ignore the bad grammar, spelling and general idiocy you find on such sites) site called obesityhelp dot com where you can find excellent information about all the different weight loss surgery types as well as having the procedures done in and out of the country.
I have spoken to at least one person who went to India for her procedure (she had RNY, though) who had an excellent experience. With the lap-band, however I would suggest doing a lot of research first. Not becuase I am against it (I did have the RNY in April 2005 and have lost 214 lbs, gone from size 34 to 00 and lost all my co-morbs), but because many doctors will not do your fills post-op if you go out of the country for the surgery. I know several people who went to Mexico for the original surgery who did not line up post-op care first and who ended up having major issues trying to get fills. Be sure of who will do your follow-up care before you go out of the country for surgery.
I absolutely encourage you to do your research thoroughly, but wish you luck in this.
As to your other questions – yes, there is a growing trend for medical tourism (many people go to South America for plastic surgery as there are resorts where you can get some of the world’s best surgeons and a vacation at the same time!). Me? I would do it provided I had enough information about the doctor/clinic/procedure and the money. Of course, as with any surgery, there is always the possibility of complications, so be aware that you may end up spending longer than you originally plan in India – make arrangements accordingly.
The lap-band? Yeh, it works for a lot of people. It would have worked for me, but 1) I needed to lose 200 lbs and I wanted to lose it quickly, and 2) my insurance didn’t cover the band. I am very happy with my decision to have WLS, and in particular the RNY, I have done amazingly well and have had little by way of complications. (I did find out I have gout – thanks to rapid weight loss and a high protein/low carb diet and I had to have my gallbladder out, due to same issues, but that is it as far as complications go) Remember that with the lap-band, the hunger is still there and is still real – it takes some self-control, since you can still eat all the same high-fat/high-sugar foods you can eat now. Heck, I know of at least 3 people who have lost over 300lbs with the band – it works for those who work it!
Never been to India – but if you have room in one of your suitcases, I am up for an adventure anytime!