Modern computing hardware is awesome. GNU/Linux allows you to have it all. Unlike other operating systems which charge extra for the privilege of using your hardware to its fullest capability, GNU/Linux lets you do everything from Day One for $0, no extra charge, nada...
To focus your mind, consider networking your PCs. Lots of people and organizations have a bunch. They are on a network so you can use them all any way you want, right? Who owns the hardware after all? Look at M$'s EULA:
"The software is not licensed to be used as server software or for commercial hosting for example, you may not make the software available for simultaneous use by multiple users over a network."