I already have the architectural layout for my 20 ft × 45 ft residence and the lower-level structure is set, but I still need a complete roof-level package. The scope is limited to the roof structure only: a flat, cast-in-place concrete slab with all supporting details... (Budget: ₹600 - ₹1500 INR, Jobs: 3D CAD, 3D Drafting, AutoCAD, Building Architecture, Building Design, Building Engineering, CAD/CAM, Civil Engineering)