Small CNC Pen Drawing Machine

Information for the business: Prototype Design details: Small mechanical engineering job: I need to make a prototype of a small XY CNC machine which will be programmed to create drawings on paper using a pen or marker. The drawing machine should be able to cover an area similar to the one of A5 paper (148x210mm) and it should be as small as possible. I would want to use cheaper materials as possible, and also cheap stepper motors (such as 28byj-48 or similar). Ideas for the visual style: No visual style needed, just the mechanical design. Extra notes: