Shots for the five horses (all recommended of the area), four dogs, and two cats runs me about 500, which is including the farm call from the vet.
I have them do the cats and the dogs at the same time as they are already out here and it saves me having to load two cats that hate each other (one is my barn cat, the other is my house cat), and the three farm dogs that weigh around 100lbs each and my little beagle.
The dogs only need their rabies shot last year, and the cats needed rabies and something else I am drawing a blank on. The horses all got vaccinated for rabies, west nile, EW influenza, and tetanus (I believe that was all of them).
On the EPM thing... I do not think there is anything you can really do ro vaccinate for. I believe that the best preventative of to keep critters out of the horse's hay and watch what exactly they are eating like a hawk. Other then that I have no advice as we have no EPM here to my knowledge...