xannax159

A separate NAS/video recording solution would indeed be the best choice. Consider a multi-core fibre-optic backbone for your network.
 
For the OS, the NAS should be either Linux or BSD, the workstation instances can run in a VM and on Win-10 if you so must (personally, Win-7 is the latest I'd go, but then I don't use Win-OS anyway, being a Linux user )

Id really suggest having separate systems. It will probably be cheaper, and much easier to setup and configure.
 
Have you done this before? What hypervisor do you plan on using?
 
How would the users connect to the system? Will they directly connect or use some sort of remote desktop connection?
 
There are some issues here, like how you want 5 gpus and 4 10g ports, and there is no board that can support that either.
 
If you want reliable, id seprate the roles, this is making it so if anything goes wrong, or there are updates that need a reboot, everything goes down with it.
 
What switches do you plan on using for networking? What 10gbe standard, there are many of them. Also why 4 10g ports, just get a single 40 or 100gbe port

not too sure myself, but i would start by looking at first gen ryzen 7s, those should be cheap enough, or 1600s, but that will depend on if you plan to run plex on it or something similar 

do you want 1gbit or >1gbit? 1gbit is cheap and easy, >1gbit gets kinda expensive.
 
Those will be very important. Id personally get those cheap external drives, but if you have the money go ssds.
 
How cheap is cheap? Really any modern system can do this. A celeron/althon is more than enough cpu power here, 8gb of ram is fine. Id personally get a used server. Cheap and lots of drive bays.

Will it work? Absolutely as long as you can map the networked storage into something native to the OS that the application understands. Basically for Windows, this means you just need to map it to a drive letter using the Map Network Drive function. Linux and the like is probably similar: just make it so the network path can be resolved like a local path.
 
Also it is possible to play games even over WiFi (I've done this before). My test game was GTAV, and it worked perfectly fine on 802.11ac. It was still technically playable on 802.11n, but the world wasn't exactly there. So you could probably still play over 802.11n assuming the game doesn't stream assets in. Obviously though, you should play over a hardline for maximum performance/reliability.