Creating a basic model to scale would be easy in Sketchup, and would likely take less than an hour to learn. Creating a fully-working, articulating model in a

Creating a basic model to scale would be easy in Sketchup, and would likely take less than an hour to learn. Creating a fully-working, articulating model in a CAD program would be very hard indeed, IME, and learning the total skill set would likely take days to weeks.