Maybe you don't need a "pen plotter", but rather a "pen robot". There are quite a few around in the 200-500 US$ range, I'll name a few only as an example to sh

Maybe you don't need a "pen plotter", but rather a "pen robot". There are quite a few around in the 200-500 US$ range, I'll name a few only as an example to show you what I mean: https://axidraw.com/ https://axidraw.com/ https://uunatek.com/product/idraw/ https://uunatek.com/product/idraw/ https://www.banggood.com/EleksMaker-EleksDraw-XY-Plotter-Pen-Drawing-Robot-Drawing-Machine-p-1125222.html https://www.banggood.com/EleksMaker-EleksDraw-XY-Plotter-Pen... https://www.robotics-3d.com/makeblock/3923-speed-plottart-robotics-3d.html https://www.robotics-3d.com/makeblock/3923-speed-plottart-ro...