In summary here's our costs:
Total cost per attendee assuming 96 total - $ 672
Breakout:
Meeting rooms $2,200
Refreshments $1,920
Lunch $9,600
Entertainment - meet and greet - $3,840
Entertainment - after hours - $2,880
AV - $3,000 (est)
Unanticipated - $2,500
Supplies - $750
Promo - $300
Presenters - $2,000 (gift cards)
Eventbrite - $1,925
Dinner - first night $13,200
Event - second night - $7,680
Admin travel - $8,000
Admin event mgt - $3,235
Admin mgt - 1,500
Projected expenses - $64,530
The largest portion of expense for events like this is the hotel food and beverage.
We could certainly remove the admin costs for covering out meeting at the hotel however in reality as I've explained once you start relying on 100% volunteers it is those volunteers who are subsidizing your events and I don't believe the group would run long terms relying on 100% volunteerism and paying an outside firm to manage would also still require one more of us to supervise an outside firm.