Holy fucking shit $50 a ticket and 500 sold, thats $25,000. You better be making a few k outta that, this is bigger than a local event! Why doesn't he get the proper licensing if it's the dude with the aircraft hanger. So long as it's not-for-profit i'm pretty sure you can charge people, but you will need at the very least public liability insurance, no doubt someones gonna get hurt and wanna sue. I DJ'ed an openhouse party 30k outta town once, 300 people was the max if you register the party with them, everyone needed wristbands. Hit max people by 7:30pm. Was crazy.