ladina

I am 58, I have 200 ls to lose, and I have my first consultation next week. I can't seem to find any information on the net about how long it might take to lose this much weight. Many sites say 26 - 38 % of excess weight in 3 years. That's 60 lbs in 3 years, or 20 lbs a year. Do i need something this drastic to lose 20 lbs a year? Many sites also say 1 lbs a week for the 1st year, and then it slows down. So after a year, I would still need to lose 150 lbs. Any info would be much appreciated.