Got up at 5am, drove across the state to watch my son's hockey team win 5-1. Then drove back, took a nap, then went and watched my son's other team win 5-1. Now, bed.
What about putting the stairs outside the house? That way you're not eating into existing floor space. It could be a mini-apartment, for when you get kicked out of the main house, and a more isolated man cave the rest of the time.