Co0kieMon5t3r

It certainly is, I use a NAS to serve games directly and leave the drive mounted all the time...
I do have a 10Gbit connection between the box and my pcs though but it works well
 
The issue you'll run into is game saves, steam does a pretty good job at cloud saves but most stuff preferences/saves etc drop to your documents, you may have to watch out if saves dont sync across.
 
As you copy/delete them you'll find that steam will want to re validate if you drop the files in manually, not sure about origin...

I would strongly look at something like GNS3, using the Cisco IOS you can get much more complex at a lower cost than running physical kit.
The great thing is that GNS3 runs images like an emulator, so no missed features.
https://www.gns3.com/