I am thinking of building a home gym and am wondering if it is possible to do this in a shed - approx 14' X 14' (4.26 M X 4.26 M) interior space. The reason is - I don't have room in my housed, and this is the biggest shed you can build in my municipality without a building permit. Max size for a shed without permit here is 215 square feet. Do you think that's enough mat space for BJJ rolling (likely from knees,) yoga and general fitness work? I figure I'd have to put mats along the walls. I would not be placing any other apparatus (heavy bags, weights etc,) in this space. I have my second kid coming and I figure getting to the gym will be more difficult than ever. This way I could do more BJ and stay closer to home. Selling my wife on this idea is going to be the hardest part. This is not a pre-existing shed. I'd have to buy it or build it. Anyone tried this?