I built my first PC in 1991. I got a 286 motherboard, 20MB HDD, 2MB of RAM, and a 14 inch CRT monitor! Unfortunately, I had failed to budget for a computer case like an idiot, so this computer ran for several months with the motherboard just sitting on top of the box it came in.
Mine was a year or two before that IIRC, built from unused parts from where my Dad worked. The PC had similar specs, except for having a case, two 5.25" FDDs, and a 3.5" FDD, 1MB less RAM, a similarly small Miniscribe HDD, a EGA CRT monitor on long term loan, and a SVGA 256KB Orchid video card I bought at a computer auction hosted at a school 30miles away for £50. My Dad winning the auction for the card got very nervous when they asked him how many of the 20x cards he wanted.
I also had an AdLib soundcard which got some good support in games, and the card supported an old analogy PC joystick through the midi port. I had mouse, that came with a dos paint package with a wireframe bitmap image of the NASA shuttle, and I eventually used DR DoS with Windows ver 2.0 or Concurrent Dos, which I had access to.