From what to create a home network with a central server and terminals?

Question

Computer networks

Typically, a home network is created from several independent stationary computers connected by wires and a WiFi point to which phones, tablets, laptops, etc. are connected. Also, a separate stationary machine can be allocated as a common server for all. In my case, this is 5-6 hospitals.
I would like to get rid of all these coffins and have only one high-performance server somewhere on the balcony, to which only terminals consisting of a monitor, mouse and keyboard would be connected by wire. Moreover, the terminals must be independent of each other, that is, they can have different operating systems.
Who faced similar tasks, please share your experience: what are the options for solving such problems now? What are the pitfalls? What is the asking price? I heard something about industrial solutions based on blade servers, but I didn’t deal with them myself.
Requirements:
1. The terminal should look like a full-fledged workstation in terms of functionality. That is, two terminals in the network should look like two completely independent machines
2. The terminal should be able to play 3D games. That is, it must have a high-performance (preferably replaceable) graphics card
3. The terminal must be able to work with two monitors
4. The terminal must be able to reconnect to different virtual machines on the fly. That is, right now I'm working from my place under Linux. At a certain point in time, I decide to take a break from work. Without extinguishing the Linux machine, I disconnect from it and connect to the machine under Windows. For an hour or two I crash monsters into a cool shooter, after which I reconnect to Linux again and continue to work exactly from the state in which the work was before the break. I know about VmWare, VirtualBox and WSL, but these are still half-solutions with their limitations
5. The server must be quiet. Industrial solutions that I have seen made noise like a jet plane. The level of noise in the house is completely unacceptable.

Answer 1

"Dad, do aliens exist? - No, son, this is fantastic..." (C) Advertisement
You want not only impossible, but fantastically expensive solution. Virtualization with full 3D capability is possible. But it is extremely expensive - cards like the Nvidia K1/K2 GRID cost hundreds of thousands of rubles, while full-fledged remote virtualization is impossible on others. Ready to spend a couple of hundred thousand on one video card?
Apart from VmWare, Hyper-V and KVM (libvirt + QEMU) - there are no other hypervisors of the first type (for bare-metal installation) . VirtualBox and WSL are type 2 hypervisors, they have nothing to do with it at all. Therefore, you will have to choose from these three.
Noisy server hardware due to cooling. He has such cooling because of the case format. Take a tower (not rack) case, stuff it with fans that do not make noise.
Immediate fixation of the state of the machine is not possible. The machine can be "put to sleep" through the virtualization environment management console, but it will take time equal to resetting the machine's memory to the screw.
There are no terminals with video cards - it's either a terminal or a machine with a video card
Well, if the estimated costs of hundreds of thousands of rubles do not scare you, it's easier to contact an integrator, for your money, any whim ...

Answer 2

You want too much.
Answer to the question: no way.
All other options are crutches, retreats and approaches.

Answer 3

Industrial is expensive. Take one desktop on Threadripper or something so that there are more cores and memory. Or several desktops, and deploy the cloud on them, for example, Openstack.

Answer 4

That is, it must have a high performance (preferably replaceable) graphics card

mutually exclusive paragraphs detected.
Either a silent terminal, in the form of a mini-computer built into the monitor, with an RDP / Citrix / ssh client.
Or a full-fledged computer, with a video card, processor. Perhaps without your hard drive - with network boot. But the video card will make noise.
What you want is not a homemade solution at all.

Answer 5

With forwarding the video card to the Windows terminal session, nothing will come of it. At least at a reasonable cost. The idea to play from any weak city or from work - on your cozy home server will have to be forgotten.
Well, so conceived by the magnates of iron and software. This is a cost-effective solution.
The rest won't be a problem.
If you want to watch videos in the terminal, then you need a 4-core processor in the server. Clamping the video before sending will go to the forehead, through pain.
There will be problems with the balcony in winter (frost). There will be problems with a glazed loggia in the summer (heat). The best place is an outdoor refrigerator under the kitchen window (if available), with air intake from the street.

Answer 6

Put a Linux server on the balcony (or VPS) and cling to it with ssh + tmux
and for playing geforce now or google stadia services (they promised to launch in November)