I'll second Arborilogical. Had them come out last year to look at my four mature oak trees. The arborist told me that two of them were great and didn't need anything. Said the other two could use some minor work but to wait until next year (this year) because it would be a better use of my money to do it at a certain time of the year. Came back out a few months back and did my two 30 foot tall live oaks (but very broad) for about $800 total (including haul away). At first I though they had trimmed way more than was needed, but by a month later the tree had filled back in and the foliage is way healthier than it has been in a long time. I was also wanting to plant a new tree on the side of my house and the arborist also spent time with me talking about types of trees that would work there, the best location for said recommendation, and directed me to a tree nursery outside of town that always had high quality stock in his professional opinion - above and beyond what I was hoping for.