ok if the problems you stating are mostly since they took trip or always going on?
if always then I would ( taking what supplies they have and set up as much as you can properly and nicely ( taking pictures of before and after ) and let them know you had great success with your breadie this way ( again showing a picture of your dragon with something you can comapre to her's with ( like a soda can or a bottle of water ). as for the rats if they are running loose and lack water bottles ( chewed up) I point this out to them and suggest glas bottles since those are longer lasting ( not replaced any yet and i going on 4 yeard) , yeah cost a few bucks more ( up front ) but if you look at replaceing them x number of times ( the plastic ) it be cheaper in long run. as for the number of rats If they not breeding for food or selling ( just happens ) I let know you found some running loose and have yet to caught them all.( pointing out the hazard if they chew though a wire and causes a fire )
I had an issue with moving up north ( not able to legally take my snakes with me ) due to permit issues) and i been paying my mother /niece to take care of them and checking on them each day( and my snakes) their care not been as good as I not had any real production ( but i been putting it off to the high heat and such./) I was always checking morning noon and night on the rats and snakes.