Lemme just say, if you plan on going on a "liquid" diet, I strongly recommend you contact a doctor and nutritionist to help you though it. Because you body needs a lot of different things, and sometimes only fruit and vegetables are bad. I am just saying this because my grandfather, back in the day, lost almost 200 pounds on a liquid diet, however, he did it on his own, and after he was sick for close to a year because he had missed certain nutritional things.
I'm not trying to scare you or anything, I think your want to do this is great actually, but just make sure you are safe bro. Better safe then sorry, right?