Product Prototype 3D Model Creation

I have a physical product in development and now need a clean, manufacture-ready 3D model. The file has to serve as the definitive prototype reference for tooling, so dimensional accuracy and watertight geometry are essential... (Budget: ₹12500 - ₹37500 INR, Jobs: 3D CAD, 3D Design, 3D Modelling, 3D Rendering, CAD Drafting Review, Fusion 360, Product Design, Solidworks)