wow.. thank you jigzz.
Dropping more than 1 lb a week is DANGEROUS friend. I'll explain. Firstly, your body has what is called a Basale Metabolic Rate (BMR as it is referred to) which is the energy required to sustain life. At 200lbs+, your would require a lot more kcals than what your are feeding it and if you fail to even hit your BMR kcals then you risk damaging your physiological systems (i.e. heart beat, kidney function, breathing etc.). Of course when Kcals are too low, your body hits survival mode and does whatever it can to avoid shut down. In your case it would start catabolizing lean muscle mass and fat mass in order to supply its needs.
So yes you might lose "scale weight", but the drastic drop in ideal body composition is not worth it. You may actually end up lighter but with an overall higher body fat %. And ill explain why; when you cause your body to hit survival mode, any food you give it after that point actually has a higher chance of being stored as fat; the reason the body does this is that the body will use what it needs to form your food and quickly store the rest as fat to use as back up if food supply continues to drop; its your bodies way of ensuring you stay alive as long as possible.
Also, you will drop lean muscle mass as your body will prioritize your physiological functions over metabolic tissue and will quickly shut down any thing that consumes high amounts of energy (i.e. lean muscle mass). So your body, sensing it would rather stay alive than be muscular, will rapidly eat at your muscle in order to stop it consuming energy.
Ive also only covered BMR, and BMR does not include the thermic effect of food, any exercise etc, so any work on top of BMR requires more energy. If your not even eating enough to cover BMR, then all your doing is causing more harm than good