Technically there is no limitation in the size of the space; it can be an airport or shopping mall - you just need to use more beacons if you want better results in a huge space.
See this GIF: http://i58.tinypic.com/33nyrgo.gif It's a 30m x 15m space (half of your space) and we used 12 beacons. You can use less if you want "corner / room" level accuracy.
Because beacons broadcast signals all around any number of devices can access their signals and there is no limit in number of people with mobile app that uses our SDK. If you put beacons high enough the signal absorption should be minimal, but we haven't tested with high density crowd yet.
See this GIF: http://i58.tinypic.com/33nyrgo.gif It's a 30m x 15m space (half of your space) and we used 12 beacons. You can use less if you want "corner / room" level accuracy.
Because beacons broadcast signals all around any number of devices can access their signals and there is no limit in number of people with mobile app that uses our SDK. If you put beacons high enough the signal absorption should be minimal, but we haven't tested with high density crowd yet.