Is it necessary to trim each time u mow? How many of u guys trim each and every time? How long would it take on avg for a .14 acre home with an avg ammount of trees/shrubs? I'm trying to calculate it. Do some custumers allow u to trim every other time. Should I charge additional for this or just include it in the price each time. If it takes considerable amount of time to trim that will up the price of course!