There's a guy about 6 blocks from my place that converted a station, completely fenced in though. Not nearly that level of design and expense. I've always appreciated it. My place would have a functional lift and the car would be inside.
For a while, I had a job where I worked out of town every other week. It was in a town that was slumping and I had thought about doing something like trying to find an old shop and convert the office area into a studio style apartment and then move my car there to work on it in my down time. I like some of the ideas he used. Most of those would play pretty well in a man cave.