I am hoping, along with what some of y'all have said, that if I'm physically fit enough to do the job currently that losing weight would only make it easier. And my wife is 8months post op and she can drink a half of a bottle of water every 15-30 minutes. At that rate I would get more than enough water. But then getting calories necessary is another story. But she drinks protein shakes that have 30g of protein in them so that would help too.