My big shop was a steel frame, I loved it!!!! I got one heck of a deal through a contractor pal on a building that had been ordered and then cancelled after the package was put together..... Saved a bunch of money!!!! Friend of mine put one up the same size about 2 months later and his cost about $5K more!!!! Besides learning which type of structure was the best for me, the biggest thing I learned was patience in the shopping process!!!!!!!!