/diy/ - Do It Yourself

newnigger here, but how often do people make their own printers? I understand that some components can be hard to find and expensive (especially for resin printing), but surely a lot of money can be saved by hooking up the printer to the pc and then installing certain programs on the pc instead of the printer having its own hardware and software? the only diy resin one I found has its components priced as if I bought a mars or phrozen, so what gives?