For a big residential user, I have 10 acres and mow 5, would this be enough trimmer? I have 2 now a Ryobi I have and a Cub Cadet that I just dislike. I am retired and have better thing to do with my time than work on trimmers. I spend more time fiddling with these two than I do trimming. I am thinking of up grading to a ZTR and my do the trimmer too. Less time mowing.