Set some ground rules to manage your expectations. Both of you need to be clear with what you expect of with each other during this long distance relationship. Set some ground rules so that none of you will do things that will take the other party by surprise.
As air is pulled from the attic space by the turbine vent, ridge vent or even an electric powered fan, the same amount of air must be allowed to flow into the attic space where the roof passes over the exterior walls of the home.
Locate each bathroom vent in the attic and visualize the best run to the roof vent for the duct work. Find as straight and short a shot that you can, as the longer the run is, the less efficient your fans will perform. Install the duct work from each fan running toward the roof vent.