I want to do this but I am kinda scared.

I am 25 years old, I weigh 195 and I am 5'4" I really would like to lose about 60 lbs. I would be happy with 40 though. I am the heaviest I have ever been and my weight goes up and down constantly but now I cant seem to lose any on any diet I try. I am not at a plateau because like I said I am the heaviest ever. I am wondering if anyone has had any serious problems on the water fast. I am also wondering if you can drink alcohol after. I am not a big drinker, once a week or so but how long should I wait to have those couple drinks after the fast? i have read almost every post since the first but could not find anything about that. I am also curious if anyone has had to have their gall bladder out after losing the weight so fast. usually losing weight that fast can make you have gall stones. Thanks for any help. becky