Well Uktra you still haven't said where you live that has a climate like Houston.
I read the article and looked up Houston area homes. Looks like there about 600 around here. I have been to several of these neighborhoods and dealt with homes that will not stay comfortable over 95 degrees. In fact my Chiropractor owns one and we are going to have to redo the ductwork and add more capacity so they are comfortable in their game room and the upstairs bedrooms.