Rob, I got a Yanmar YMG2000D. It's a 20hp at
PTO tractor. Large enough for all my maintenance purposes, but too small to do this excavating.

My only implement right now is a box blade. In the spring I'll be getting a 4' shredder. Also on my list of wants are: single moldboard plow, tiller, post hole digger, trailer and or dirt scoop.
tororider, I'll check into the austrees, please post pictures if you have them. I'm actually a Landscape Architect by profession. I've got some specific ideas about how to handle the screening of his house.
The excavator was working this morning, and has shaped things up a bit more. Not enough for more photos yet

but probably soon.
We're supposed to get some rain at some point in the next few days, which will make the dirt much more workable. It's like a powdery dust right now.