Contrary to what
@DeborahJane just said, I was going to chime in and say it's not all that expensive to have a professional take out a tree. All relative, I guess. When I bought my house there was a very, very, extremely VERY tall ash tree (well in excess of 100 feet tall I think) in the front yard and it was not a question of
if it would fall onto my little house, but
when. It cost me $425; I did the "budget" option and they left the wood tidily chopped into logs, and did not grind out the stump. Two guys in one hour and they even raked my yard. They did it with a truck lift (not cheap to rent BTW) and the way Chuck describes, branches off from bottom to top, then the trunk from top to bottom. I went up on my roof and took photos, it was cool how efficient they were! And I put the logs on craigslist for free and they were gone in a day.
Last year I had them do $625 worth of pruning of extremely large limbs over the hose and deck and removal of some dead trees. May have some more work done this year too. I have a ton of trees. They chipped up a bunch of the wood for mulch, which was handy. They couldn't get their truck into the back yard so did all of that climbing the trees with harnesses on.
Just a cautionary tale: my neighbor's sister hired an uninsured handyman to remove some large branches. He took down some power lines by dropping a branch on them and the local utility charged her (as the homeowner) $2,900 and change for the repair. Not sure if her homeowners' insurance covered that or not, but the handyman didn't have the money to pay her back. For any work that could threaten power lines or structures, I personally would only go with a reputable insured tree service. I really think this is one of those tasks where "if you have to ask online how to do it, you shouldn't be doing it yourself."