When i couldn’t afford a new computer, i went out and got one of those raspberry pis. you need to have and external mouse, keyboard and monitor, but the “computer” itself is relatively cheap. I think you can get a one for something like 50 bucks. You have to load it with a lightweight os like ubuntu mate, or something with lxde as its desktop environment.

that, or you could go the more pretentious route and get a typewriter.