Optimize Heavy SketchUp Model

My current SketchUp file has grown to roughly 100 MB after importing several 3D Warehouse items, complex textures, and high-detail models. It now opens and saves painfully slowly. I need two things... (Budget: ₹600 - ₹1500 INR, Jobs: 3D Animation, 3D CAD, 3D Design, 3D Graphic Design, 3D Modelling, 3D Rendering, 3ds Max, SketchUp)