hotspot hardware recommended for 5000 concurrent users

I am preparing a project for a wifi hotspot that will cover an event where you expect something more than 5000 users. As the AP points idea is to use RB433AH with 3 radios + 3 sector antennas which should of put up about 150 concurrents users.
But as header system, perhaps a rb1100AH​​.
Thanks for your help

Current revision of RB1100AH does not have enough storage space to run user manager and hotspot packages.

User is over RADIUS