Best setup for multiple sites?

Hello.

I’m new to the Synology game and wondering about a best practice for our setup. I searched around but didn’t find an answer satisfying enough.

In brief- we are shooting a movie in Portland, I’m editing in Tucson and we need to also transfer the files to Burbank. The sites will have a DS1823xs+, DS1821+ and DS1821+ respectively. I basically want each location to have the other NASes available in Finder and be able to remote desktop into each LAN. All the tasks are going to be done locally, editing, transcoding etc.

I was originally thinking if each box was running OpenVPN with “Allow client to access server’s LAN” we’d be good to go, but after doing some looking around I’m not so sure. There will only be a handful of users on the system, will OpenVPN work?