Well I finally spent some time working on upgrading my main City's field. Because I don't spend any money on Dragons of Atlantis, the highest level I will get most of my buildings to is level 9. Here's a screenshot of my finished Field.
It took me quite a while to upgrade everything all the way, but I've had the last three days off of work and spent quite a bit of time online working on my guides, blogs, and playing some games. Level 8 to 9 for resource gathering takes just under 40 minutes, so I was able to start an upgrade, work on something or go do run an errand or go to the gym, then come back and start a new one. This seemed to work out well and has also helped greatly in my resource production.