I'm not sure this is all of it, but I'm from Mansfield and known several people who are interested in Waxahachie since it's "away from the hustle and bustle". Several families I know started in one of Dallas or Fort Worth, moved to Arlington for a small town life, then it outgrew itself, so they went to Mansfield, and now it's big. Waxahachie is just the next town people want to get away from sprawl it in. It seems to be a never ending cycle I guess.
Aside from that, there is a lot of industrial jobs around the area, especially toward Midloathian and Alvarado.
Cleburne is also got some things going for it, a minor league baseball stadium and a large mixed use project are
in the works.
Mansfield
just completed a 7 story expansion to double the size of the existing Methodist hospital.