*Warning! Nerd-speak!* 😁
FYI - For those of us in the IT industry, our go-to method for working on multiple computers is to remote into them.
This can be very useful for a home environment where you can have a small, low-powered computer (or laptop) attached to a nice monitor (I still recommend getting something like the 43" 4k TV's that are only around $200 now-a-days). Add a nice wireless keyboard and mouse (and sound bar). Basically get that setup to feel great. Then keep your other computers somewhere else so that they can have noisy fans or whatever going without disturbing you or taking up space in your main work area.
Side-note: I strongly suggest adding Uninterruptible Power Supplies or UPS's to every area you keep computer gear in! They're not that expensive and will not only protect you from power spikes and drops, but will give you time to save what you're working on and gracefully shutdown your machines should the power go out.
I have several computers that all connect to directly to a router (including my main computer in my bedroom/office) using CAT 6 cables. Wireless is also possible, though I prefer the speed and reliability of being directly connected.
Then you simply create Remote Desktop Protocol (RDP) shortcuts on the desktop of your comfy computer and access any of the other computers remotely whenever you need to. I also create shared folders on each computer so I can easily transfer files between each without connecting.
Although you should have a "portable" wired mouse and keyboard available just in case you need to do a setup on one of these other computers, you can actually keep them "headless" where they don't need a keyboard, mouse or monitor!
🤓