Ours is in a spare bedroom with a lock on the door, none of our non AB friends has ever asked what was in there or if they could go inside, we just keep it shut/locked whenever we have friends over.
I paid around $1000 for mine without the mattress, it has a twin xl size mattress and I'm 5'10" and I'm not cramped when I'm sleeping in it. He's currently making me a high chair,