There's 3 other crew who we don't see. 1st officer, engineer and 1st mate I think.
If you look at the link someone posted earlier, this boat is large enough to have a touch and go helipad, which they've never had on a boat they've worked before. There's 2 sides to the master bathroom, it looks bigger than the bottom floor of my home :). Each stateroom ( besides the master) has 2 queen size beds, and the smallest one has a king bed. So that leaves little space for the crew areas. I would be so claustrophobic working in that kitchen area and talking to the chef through a cabinet.