What is the maximum number of Netgear Orbi Satellites that can be supported by Netgear Orbi Router?

I know that the Orbi is technically meant as a mesh in-home system. However, because of my setup at work, we run a similar topology to that of an in-home system. 3 satellites is not going to cover my entire building. Would it be possible to add more Orbi routers with 3 satellites each? i.e. Floor 2 has one Orbi router and 3 satellites. So does floor 3. But that would mean they would all need their own SSID? part of my interest in the Orbi is the seamless handoff during wireless device roaming.