I aggree with the statement you need 50-60 trucks to keep a tech busy. Any less would be a waste of money on your part. The post that stated 1 tech handles 250 - 300 trucks, I dont believe. NO tech can handle 250 - 300 trucks - correctly. Which means PM's on time, repairs done correctly the first time, battery & charger maintenance. The only way a tech could handle a count like that would be to have a service company in constantly helping which defeates the purpose.
Theother thing to concider- the age of the fleet. If your talking a new fleet, theres not much for an in house tech to do. You will have your usual warranty fixes and some damage, but not untill the hours start adding up and the PM's start. You also may want to look into a full maintence package where you pay one fee, which takes care of the truck, PM's, and repairs. Again depending on the amount of trucks you are concidering.