Switches with two 10G ports aren't that expensive, and would support hooking a main desktop up to a NAS, while offering basic connectivity to other systems. Or

Switches with two 10G ports aren't that expensive, and would support hooking a main desktop up to a NAS, while offering basic connectivity to other systems. Or for that matter, since many systems with 10G also have 1G ports, you can direct connect them, which is how I have two computers. Switched LAN to talk to everything, DAC cable to each other.