I’m wondering if there’s a way [to] combine their computational power.
Only if your problem can be be split up reasonably, otherwise you will spend more time waiting for data to move.
Where it can work: video encoding, CI pipelines, data analysis
Where it won’t work: interactive stuff, most single file operations
I want to get into server hosting […]
Then you don’t need another reason to do it.
[If] I can connect them all to one display [or] make them all accessible in one place.
You can either get a hardware switch or chose a primary computer and connect to the others. For that you can use remote desktop software or be a try hard and use ssh.
Only if your problem can be be split up reasonably, otherwise you will spend more time waiting for data to move.
Where it can work: video encoding, CI pipelines, data analysis
Where it won’t work: interactive stuff, most single file operations
Then you don’t need another reason to do it.
You can either get a hardware switch or chose a primary computer and connect to the others. For that you can use remote desktop software or be a try hard and use ssh.