Well, electrical isn't a problem. There are plenty of outlets already. I wouldn't mind eliminating windows and such, but that would be outside the scope and budget of this project. There is no ductwork in the room right now but I am going to have it put in when I get my furnance replaced. My wife's uncle is a heating and cooling contractor and he didn't seem to think it would be much of a problem with using the room all year if the room is insulated and ductwork is in place. The room is literally above the area of where the furnance is. And in terms of cooling, hopefully the ceiling fan will help with circulation.
inspectorD - Ventilation would be tougher in my case because the roof is simply a standard "porch" roof, no ridge to speak of therefore no ridgevent. I'm sure that I could use some other passive ventilation or some type of fan but I'm not sure that it would do a whole lot for such a small area. When you said about using foam board, are you talking about putting this in the ceiling? Does this mean I shouldn't put the R-30 kraft-faced fiberglass in the rafters? Where should this foam board be attached to? And are the vent baffles still necessary just to maintain space between the insulation and roof?