Once your forum is set-up the way you want it, it pretty much runs itself. (You'll need to approve users and back-up your data of course.)
The most time consuming part of running a forum is the moderation of posters and posts. Hopefully you can get some help there and give some trusted users 'moderator' privilages.
The only other thing you have to do is upgrade the software periodically. Although I don't enjoy doing this, I can honestly say that I've never had a problem result from upgrading - touch wood
BTW, I would definitely sign up for the demo, what do you have to lose?
