VPN Network connection from residence to corp office

You're first going to need an internet circuit for the remote location (if you don't already have one) and it needs to have a static IP address taht you can give to the router (meaning an IP that doesn't change), so when you call whoever the internet provider is, that's what you ask them for, a Static IP address. Yes, you will need a router. There are a couple of ways that the connection between the two sites can be configured but because this is security feeds that need to be carefully kept private, i would think that the best way to do it would be by creating a VPN tunnel. both ends need to have some configuration. You'll have to coordinate your efforts with whoever does IT stuff at the corporate office.

You have multiple options:
1) Getting a very good high speed connection and setup a VPN tunnel between the two locations. As long as the tunnel has good bandwidth, then you shouldn't really have issues.
2) Get a private line between the building and the corporate office. Downside is that this would be quite expensive, and not worth it for what you're seeking to do.

Personally, I would keep the NVR where it is AND go with option #1. That way, you don't have to worry about losing anything while data is transmitting from one site to another. However, I would recommend that you maintain a backup of the NVR at the office location. Additionally, with the VPN tunnel, someone from the office could access the NVR remotely whenever needed, plus the manager at the complex could access the NVR whenever needed for police reports, etc.