So we are a hotel and conference center. we purchased 2 r500 unleashed, which we are running standalone. One of the devices is in a ballroom approx 45ft by 15 ft. We have a conference comping up that will have 200 attendees. Each attendee will be using 3 wireless devices, and they want to be always connected. for a total of 600 devices. what do I need to add to be able to grant this request?