I would say 4,000 calories is a good place to start for somebody that size. At my weight I try to drink a minimum of 120 ounces of water a day, so I would shoot for a MINIMUM of 150 for him right now. Dramatic weight loss is hard on the body and organs, and water is ESSENTIAL during this time.

Does he have a computer? If so sign him and get him on here. We would all love to help him along his way if he so desires. The hardest part is getting started!