I built an office using old computer equipment people threw out. I didn't care how old the equipment was, I simply used what I could find the best way I knew how.
Today our cell phones have more power than the computers I started out with, but I always say "do the best with what you've got".
Unfortunately I had to close that office and start again. My dream is to have a room full of screens that help me track my businesses and showcase what I do in "real time".
Sadly most of those computers were lost in a storage unit. I continue to collect old computers and put them to work any way I can.