I followed that plan. It worked great. To answer your first question, if you are used to a certain amount of caffeine/coffee, then most likely your aldosterone levels "balance out" so to speak, meaning that you are probably okay with a bit of coffee/tea here/there. Secondly, caffeine is a diuretic as you may know, so with that you may be able to deduce the answer of how it will fit into the plan. About the oil, blue cheese would be fine in moderation. I would say coconut oil would be a better addition to your diet.