Good feedback Jason. I'll chime in with text of my original response to Undisclosed in our initial email:
"(Multisite) scaling Continuum to multiple servers can be done, however it isn't a linear path compared to 'Access Control' specific solutions like the Mercury based solutions you mention. You have to license additional portions of the building management software to have multi-site connectivity.
Andover Controls specializes in HVAC management controllers, and the 'Continnum' portfolio is a 'me too' offering that allows Schneider building management integrators to also 'do access control' as a corollary offering. However, it is not very common in the field, and Andover /TAC's access portfolio is outdated when compared with mainstream vendors.
Aside from the dated hardware design, the initial acquisition costs and ongoing system support might be a big issue. Most security integrators can not bid, nor are able to maintain/support an Andover system. Finding someone in close proximity that is able/willing to do so will be a challenge.
Your recommendation of a Mercury-based solution is much better from this perspective, as your global client will be able to find local support of the system rather easily compared to the Schneider offering. When it comes to bids, they will be able to solicit bids from a much larger pool of responders, and pricing will be more competitive and less expensive simply due to economies of scale."