Redhat 4.1 back in 97. I even purchased the CD from PC World, seems wild now to buy a CD/DVD of a distro.
First PC I installed it on was a work laptop, had to compile a bunch of kernel modules and then the kernel to get everything working but get everything working I did, Thinkpads being good for Linux even then.
If you want to employ staff that way go for freelance with a fixed duration contract and an increase wages to reflect the temporary nature of the work. This is how it works in the rest of IT, at least anywhere sane.