Network usage estimate?

Howdy...longtime Rust player here who stupidly decided he wanted to start running a server this year. I initially hosted a cheap dev instance through GameServers. At $8 per month, my expectations were pretty low, and their service delivery has ranked even lower. I've had 3 crashes that resulted in wipes so far, after only 3 weeks of using their service.

I never expected to stay with them long term, but I also didn't expect to progress to my next step so quickly. I have a cabinet at RagingWire data center here in Northern Virginia. I have plenty of space and power to install a dedicated box for Rust. What I'm not sure of is our network usage. Can anyone give me the formula, or a ballpark, for determining peak network usage for a server with 50 players on it? Thanks!

In response to C4talyst ():
Howdy...longtime Rust player here who stupidly decided he wanted to start running a server this year...
Varies depending on amount of packets client receive per second, so basically higher tickrate/fps results higher network usage. Also depends of packet size which depends on amount of data (Entities) being sent to client and received from client.
I recommend to calculate as of 2kbps in per client and 6kbps out per client (approximately). We get 100 kbps in and 300 kbps out for 50 players ALREADY on server. 
You will get spikes of outgoing usage when client is loading on a server, and also little spikes when client send many updates (basically commands such as movement/shots/building/crafting etc) to server.

Ok, so full server / peak usage in terms of fps and we're under 1Mbps...that works great! Thanks so much 2Chev!