Hey Oppo - a question for those who know something about installation/upgrading of multi-tenant entry systems...

We currently have a Pacific Electronics system (from what I can see, this is just the simple, budget solution that is often chosen by builders) with the following components:

3 button panel and these horrible stations in each condo

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So how complicated would it be to upgrade to something like this (this particular one is from BEC Integrated and we would be interested in the entry panel that includes a card/fob reader as well):

I know there will be at least one additional component for the video relay, but what else might we be in for or should be concerned about?

Thanks, have this as appreciation: