I'm a professional audio engineer specializing in corporate events. I typically operate equipment that comes in 18-wheel trucks and is rented from large audiovisual rental companies, requiring a crew to load in.
My personal equipment will comfortably accommodate groups of up to about 600. My rate for me with my personal equipment is significantly lower than in-house hotel rates.
I work in all of the area convention hotels, including Disney properties, and the Orange County Convention Center.