Educational Mini Crane Design

I need a complete technical package for a palm-sized desktop crane that lets students see exactly how real cranes work. The model has to be fully manual: every lift, lower, and 360° rotation is driven by hand-turned gears and knobs—no motors, batteries, or electronics at all... (Budget: $30 - $250 USD, Jobs: 3D Design, 3D Modelling, 3D Printing, 3D Rendering, CAD / SolidWorks, CAD/CAM, Mechanical Design, Product Design)