Are you not going to be there when the landlord comes? Do you have a lock on your cab? I think I would be a bit nervous to have someone in my house or apartment if I wasn't there to keep an eye on them. What if he says, "Uh, KB left the fan on when he isn't here. I think I'll do him a favor and turn it off." And then he still hears something running... If it was me, I wouldn't worry about the remote chance of a hermie just because it is going to get one short day. I'd turn everything off and remove any power cords going to that cab. Ya know, when they spray for bugs, they look behind things and in every nook and cranny -- at least if they do it right. If he sees a couple of extension cords running in to a file cabinet, he's really going to think something is weird. I'd just shut it all down for the time he's going to be there. Sorry if this sounds overly paranoid -- I just would want to be very careful if this was my grow.