I did a similar thing. My P2-233 (at the time this was the top end) blew a PSU and I did my engineering writeup on a P66 (pulled from a campus skip) with 32Mb of RAM using heirloom nroff, eqn, pic and vi on FreeBSD because it was all I had access to and you couldn't compile TeX on that box in a week. I have a lot of respect for the troff family of tools and still use them now.

Cost of software and hardware for that was £0!