Mobile home. On the road, it measures m by m, and once it has arrived at its destination its floorspace can be increased threefold in a matter of seconds. "De Markies" was awarded the Public Prize at the Rotterdam Design Prize
Office space in an RV wheel under the bed. Could also build a fold/lift up perm wooden station so items don't have to be put up & down when you put the bed down. Maybe even on of those lift up coffee tables?