Looks like a good plan brother. With good training and good diet, you should be on track to make some nice gains. As for your winstrol, you can split the dose up, taken 2x a day and get more stable blood levels..Honestly, though, I'm splitting hairs. It probably won't make a difference in your results. Looks like you have done your homework.
Not sure about the reasoning behind the "large glass of water". Accutane will dry you out but it will take more than 1 glass of water to stay hydrated. Unless you have acne issues, I would shy away from accutane. Its super harsh on your liver. If you do feel you need it, you might want to hold off on the winny. I never suggest taking it while taking an oral steroid