Take Region 20 for example. Highland Park is much different in SES than say Desoto, or Ennis, yet all three are quite successful. Same with Region 9. Huntsville, Conroe, and Klein all have a lot in common, yet are all radically different in who lives in and what is in each district/school’s attendance zone. All three districts have consistent first division programs in their schools, and in some cases are among the state’s absolute best.
If your goal of success is “make a 1” that can be done at any of those schools/districts. If your goal is “realistically compete for honor band” then it can’t right away at all of them, given the honor band caliber programs in each of those regions and areas whose directors flat out aren’t going anywhere.