If possible, take photographs of each house: the outside, the major rooms, the yard, and extra features that you like or ones you see as potential problems. And don't hesitate to return for a second look.
When doing tree pruning work, making an extra undercut with your pruning saw will help keep the bark below heavier branches from stripping down and marring the trunk. Make the undercut from below the branch, about 4 to 6 inches out from the trunk. Then cut from the top of the branch, just outside the lower cut. Lastly, use the saw to make a final cut close to the terminal base.