Three unit 100 kva design and estimate

rainy that's why I'm in the office whole day. during that day one of the thing that I made was to make a design of a 3 phase 3 unit 100 kva transformer to supply Techno Stress Corporation and I made it, but it took 3 hours to make. First you should make a design with road the existing pole and the proposed poles and transformer then thats the time to start making estimated materials you must first make a list of all poles, standard construction, wires, others. Imagination is very important and making a design you must to figure out all the posibilities and then all the materials needed will follow.