Options for building a new garage

I have a buddy who cheaped out, and built a steel building. He cooks in there in the summer. Inside has exposed metal studs.he tried stuffing insulation in between. Looks like crap. No flat wall surface to mount shelves to. As was already said, build it as big as possible. Make high enough roof for a lift. You may not be getting one now, but when you do, it will change your life.