Post a pic of what you're thinking of so far and we'll tell you how badly you're screwing it all up.
Sectioning the brew area off vs. leaving it all together is mostly a personal choice. Do you envision non-brewing people coming over to chat while you brew? If so, you might want to have it all in one space. Do you think some of your guests might have a problem with the smells associated with brewing? If so, then you might want to leave it separate. Brewing is kinda messy, so if the messiness might interfere with the aesthetic of the man-cave, then you might want to have it separated.