jeffereythree, Checked out your blog and will follow your progress.. Have gone through many of the same steps and being a DIY guy will read your experiences with interest. This website may be helpful:
http://texnat.tamu.edu/BrushBusters/index.htm for some of your projects. Noticed your mowing of volunteer trees. Please note that Locusts( if you have them) will be a 100 times worse after mowing. Use of Surmount & Inergy(surfactant) for foliar application or Remedy/diesel for very large tree trunk treatment is the only way to control them.. Good luck..du