[DannyOcean_]

Also, as an advance to the water-cutting at the end, start drinking 1 or 1.5 gallons of water every day. Teh professional athletes who do this actually carry around a full gallon with them to measure how much they drink. You'll train your body over the course of a month to piss out 1 gallon every single day.

Obv. when time comes the last couple days you drink like a couple glasses a day, and your body will still piss out large amounts for a few days. Then you sweat the rest. 5-10 pounds will be easy and you won't need supervision, 15-20 is doable but you should have a doctor/personal trainer type to monitor you. Nobody does that much on their own.