I still don't completely see why it'll be $2M, unless that's the total cost including the service contract for the system's lifetime. I mean, the hardware and installation labor can't be that expensive, right?
Not all that much pops out of a few searches, but there are discussions of projects that make me think that $100,000 per building isn't a lot to spend on such a thing.
The point I was trying to make was that they likely already have other systems in the remaining buildings.