There is an aspect that is inspired but I think your implementation is harder than it needs to be: don't use 3D printing to make big flat surfaces! So much of the robot body is flat - which is great because you can use simple metal plates and sheets for those surfaces. Those are easy (enough) to mark and drill, either by hand or with a CNC router. This is usually much cheaper and faster than 3D printing those parts; simple steels are common and aluminum is also good. A thicker plywood works too if that's all you have. I'd replace every flat piece on the robot's body portion with a metal plate. It'll probably cut your printing time in half, and make it much more stable and durable.

If it's daunting to drill it by hand, the easiest solution is to print (on paper) the 2D design file showing where all the holes need to be at 1:1 scale. Then lightly glue (gluesticks are great) the paper to the metal plate. Then you can simply drill at all the marked holes; that will give you an accuracy the same or better than a 3D printer, especially if you use a spotting bit to make pilot holes.