Metalic Pergola

I require a structure proposal for a first floor roof pergola. It must optimize the space. I seek the lowest price in material and the highest structure strength. I need maximum space between columns (posts). I want geometrical and stetic look. Minimice the number of welds. To consider the weight over it: shade screen(aprox. 183 cm width, zig zag pattern over the metal) and polycarbonate plastic sheets (in half the structure). Recommended use different types of metallic profiles (U, O) to optimice price. The objective is to create the cheapest estructure that can hold the light weight of the shade. To be installed in souther Mexico, mild winds, high sun exposure, urban context. The structure must consider all parts of installation, posts, columns, beams, anchors, etc. Need of simple load calculations. Roof of irregular shape: covers first floor, spans between 2 roofs, partiality covers ground floor.