I have some pine trees in the yard of the house I bought that have overgrown the area they are in. They are older trees and have grown through the chain link fence, coming close to power lines, and one is about to start hitting the side of the house and blocks the walking path. They have killed portions of the lawn as well. I don't want to kill the beaches I'm trimming I just need to get them under control, does anyone know how a guy would do this?