Just like in first life running an event is not cheap. You need to take into consideration everything from tier payment (if you have your own venue) to artist fees or whether you want to manage a venue (this would cut out the extra tier payment) If you're not willing to lose money you shouldn't be running a venue. Second Life venues do not make money. More venues than not close because they get in over their heads and are not realistic with their expectations.
Class will be held in voice