SolidWorks Stair-Climbing Pram Design -- 2

I already have a high-level visual render for a non-electric urban pram and now need the full mechanical design built natively in SolidWorks. The concept relies on a tracked or belt-like drive so the pram can glide over outdoor stairs with uneven surfaces... (Budget: £20 - £250 GBP, Jobs: 3D CAD, 3D Design, 3D Modelling, 3D Rendering, CAD / SolidWorks, CAD/CAM, Manufacturing Design, Mechanical Engineering, Product Design, Solidworks)