Yep trimming trees that high would require a professional. This is a true story. In my efforts to get a clear signal, a friend of mine was convinced he knew how to cut trees. We cut one down but was a tough one on how it leaned and it actually came down on another tree. Sat there but it was imminient that it was gonna take down the power lines on my road. I called the power company and they wouldnt come out despite a tree was gonna fall on the power lines any time.
So I went to bed that night but it was really windy. You could hear the trees cracking. I put the power company on speed dial. Sure enough around midnight, crack, snap, power out. Speed dial to power company, tree gone by day break. Turns out, I needed the tree to the right of it to clear 119. Professional came out a few months later and got my correct tree. Neighbors still wont let me live this one down.