I have one coming over to do an estimate as we need a couple of trees taken down. But as he'll be over and we have lots of neglected trees should I be taking the opportunity to do a walk around to see if he thinks other trees require any "surgery". Also, what do grown ups normally do when they have a garden with lots of trees - get a tree surgeon in on a regular basis for maintenance (if so, how does that work?)? All advice/insight welcome as I'm a novice at this whole garden/tree lark.