To cleanse or not to cleanse

I am considering the master cleanse as a kick off to my attempt at getting back in shape. For those that dont know what the cleanse entails you start with a laxative tea the first night. ( Im told you dont want to mess with a senna tea it will make your night somewhat uncomfortable) The next morning you have a half liter of lukewarm water with 2 teaspoons of seasalt disolved in it to start your day and then you make a lemon drink equal parts lemon juice to pure maple syrup mixed with water and a pinch of cayenne pepper. Your allowed some caffiene free mint tea but thats basically it till your laxative tea befor bed. 10 days later you should have lost about 20 pounds but also detoxified your body and cleansed your colon which who doesnt need that!?! I guess the real question is when to start? I hava a wedding to go to in about 2 weeks so i want to be done by then. Ill take some before picture which will probably be worse than Heathers cadaver photos but its all for interest sake.