I personally like the idea of keeping the mod a "small town mod." I'd recommend slowing down call volume (I do on all my mods) and making the map feel more rural, with some more open areas with brush for grass fires and more residential. If your going to add the current station I would add a Water Tender/ Tanker. Maybe you could build a EMS station at the hospital or another part of the town with a ambulance and a supervisor.