Only if you know what you are doing. Just because someone owns a chainsaw doesn't mean they are an experienced arborist,climber and rigger. Many times I have been called upon to bail out someone who got in over their head trying to take down a tree that was well above their abilities. We get big money for a reason. Training, proper equipment, insurance, and the risks we take to piece down a tree in tight locations are just some of the things that we take into consideration when we price a job.