I would price out how much you think it'll cost to have that many attendants before committing. If all of those potential BMs and GMs have partners, for instance, you'll need to invite them to the rehearsal dinner too. Which means you'll be hosting at least 44 guests before factoring in any of your family members. You'll also need to think through how much bouquets and bouts (if you want them) will cost. And will you need an extra limo to transport everyone? Also, how much can you budget for wedding party gifts?

If you've crunched the numbers, and thought through the logistics, and you still think it's worth it to have that many people, then go for it!