You can see the New Economy House here: http://www.neweconomyhome.com/Site_2/Floor_Plans_-_NewEconomyHome.com.html.
Things I noticed about the New Economy House:
- Not too much provision for a hall closet - if you wanted to have a basement, with stairs underneath the existing staircase.
- Bathroom layouts upstairs are a little tight.
- 2' thick walls leave the windowed facades quite a bit different looking from the original
- the 30" thick roof similarly has a strange appearance that needs to be addressed.
Here is a visual: