get a realtor would be my first response
construction is iffy--tract builders have pulled back--some have gone bankrupt and ceased building, while there are commercial builders and remodelers that are doing well--partly it depends on the area and price range the work is done in...
check TWC online site for jobs in his field
google for list of taxes per the different suburban areas--you can check
Tarrant Appraisal District for info on tax rates in Tarrant county
in general unincorporated areas (county only) will have lower taxes than city areas but you also have reduced services since you don't have city police/fire/emt/--or maybe water/garbage services either--but private contractors or well/septic systems...
this area is large---so much depends on where you work as to where most people choose to live
price point is also important and so is the ISD whether you have kids or not, schools are important for resale, appreciation, liveability...