Mechanical 3D Model for Prototype -- 2

I have a mechanical concept that now needs to leave the sketchbook and become a precise 3D model ready for rapid prototyping. Your main focus will be parametric 3D modelling—no 2D drafting or electrical work is involved... (Budget: $25 - $50 USD, Jobs: 3D Design, 3D Modelling, 3D Print Design, CAD/CAM, Fusion 360, Solidworks)