Intercom System for Multifamily

[Monish Lillaney]

Does anyone have a recommendation for an intercom system with Video for a 3 family house? I have gutted it and am turning it into 3 condos, but am having a hard time determining what kind of intercom system would be most suitable. The intercom is to communicate with the mail room and guests, and allow each unit to release the electric door lock

I am not looking for a subscription with an annual fee. A one time fee for the hardware is an ideal solution.