[He could argue that they can be comfortable even without planning to stay here. But he goes with another option.]

I bet me and Toph could put something like that together pretty quickly. The plumbing would be a little messy. Maybe we should switch rooms. [Since he's next door to the second bathroom already, the plumbing would be easier.

Not that he's ever done any plumbing, but he's pretty sure he understands it.]