I can't answer for you or your club, but if it was my boat, I would want a tower.
I've had my boat with and without a tower, and greatly prefer a tower. Keeps gear out of the way, place to hang towels, teach people to ski/wakeboard, object to safely grab if someone is coming in hot to the dock, bimini out of the way and nicely secured. The wedge is really really nice as well to allow for alternative sports. With that said I am an average Joe who will not be buying a boat newer than 10 years old, but when I upgrade next, my boat WILL be a DD with a tower and wedge. It cost me $5k (and 4 weeks of no boat) to add a tower, new bimini, and cover.
However I'm sure I use my boat significantly different than your club does.
One thing that you might want to weigh in also is, does the club have kids/wives/members that want to learn, trick ski, wakeboard, or wakesurf....or is you club one that doesn't allow anything other than experienced buoy skiers? Having a tower helps gets more people on the water and exposed to the sport.