No intention to built any soon, just dreaming and imaging how it would be possible...
First learn 3D softwares adn electric motors and batteries, then learn functional 3D (with gears, suspension, working in a 3D model), then learn more details for electric motors and batteries, then built a scale model (after learn about composities), and if all work, research if it's possible to find sponsor, and get sponsors, built it after buy tools.
The extructure you proposed maybe could be achived with tiny metal tubes, like the ones used as conduits. But the cnections between the tubes would reduce precision.
The edges of each tube would have many different angles (the curved point for connection) for different tubes, making difficult to measure and bend exactly.
Maybe wood strips and a precision saw, with angle cut adjust, would be cheapper.
But still would require foam strips to smooth.