To give you a perspective different than mommytlc, I'm a president, and I think I have a much easier (and less time consuming) job than our treasurer has. I work full time, so I am rarely at the school during the school day. I try for a couple of hours every other Friday morning. The key is to have good people in important positions and then actually and truly delegate to them. Don't micromange them, and don't allwo your board ot do so either. This is my first year in this role, and I am constantly redirecting comments at meetins by saying things like "those are all good thoughts and, if you feel strongly, talk to [Mary Jane] offline, but I'm going to trust that [Mary Jane] can make this decision and let us know how it goes. I also say "that sounds like a good idea - -who's willing to lead this?" If no one steps up, then it doesn't happen -- I don't think I have any obligation to fill every gap. To give you some idea of scale, we're a relatively small city, public elementary school (250 students) but we raise and funnel over $100,000 each year to support everythign from $500 supply funds for each teacher, to a vocal music program to a chess program to a volunteer coordinator, a part time counselor and reading instructor, etc. The adults fund raise through direct giving, an auction and book sales. We don't ask our kdis to sell things door to door. My point being that even with a big program, you can structure the role so that it doesn't consume you. On the other hand, if you want to be consumed, it can easily do that. But if you are the type who likes to be consumed, remember that part of your job is to find and groom your suceessor -- and if you're doing it all yourself, you don't give other folks the chance to test their wings, or the group to imagine what it would be like to be led by anyone else.
Good luck.