Stair Escalator Concept Design Needed

I’m seeking an experienced designer to develop a stair escalator concept for a startup, intended for commercial use. The design should be compact and cost-efficient, capable of being installed over existing stairs without major infrastructure changes… (Budget: ₹15000 – ₹25000 INR, Jobs: AutoCAD, CAD/CAM, Engineering, Engineering Drawing, Mechanical Design, Mechanical Engineering, Product Design, Simulation)