Hi I am a RN and also considered the GB surgery, but I seen so many people come in with complications over the years I decided I would rather be "fat" than have those problems. Don't get me wrong many people never have a problem, but those that do are miserable. So first I would like to encourage you give natural weight loss one last try... I did using this site and a personal trainer and in 10 months have lost 110 pounds. It takes a lot of discipline to eat healthy and workout regularly, but it will also take that same kind of discipline to eat the way you have to after a GB.
If you are absolutely sure about the GB, the weight usually comes off at a rate of 2-3 pounds per week in most patients, we get you up and walking the day after surgery to reduce complications like a blood clot or pneumonia. Depending on which type of GB surgery you get the recovery time varies. You can always call the surgeons office and speak to the nurse, she should be able to answer specific questions. Good Luck