Multi-Family Intercom System Recommendations

[Teddi Poehls]

Hello BP Community,

I recently purchased a 4-plex on which I am in the process of executing the BRRRR strategy. It is a 2 story building and the entrances for each unit are behind a front entry door that needs to remain locked. I would like to install an intercom/buzzer system that also has a key fob entry for the tenants. I've done some preliminary internet searching for a system but with the abundance of cheap technology out there am having a hard time determining a good stable solution.

Do any of you have experience with these kinds of solutions where you could recommend a commercial grade product? 

Thank you!

Teddi Poehls