RE: Master Cleanse - 4-5 days of Fasting
I also wrestled and had some moderate success at doing so. My weight class was slightly lower than yours. Wrestlers have an advantage with fasting/losing weight as we trained our bodies to be use to having a lack of food as many of us lose an abundance of weight for competition.
There's lots of benefits to fasting and allot of the top MMA fighters use that method. Below is GSP (A top semi-retired MMA fighter) talking about intermediate fasting.
Personally if I was going the one meal a day route I would eat that meal sometime after hours of waking up. The reasoning for this is because of our activity during the day will help burn the calories we consumed from our meal. Eating before going to bed doesn't have that advantage.
Good luck with your goals!