Just a thought to consider. Texas has what's called the "8 hour rule" which limits the amount of rehearsals you can have outside of the school to 8hrs for the calendar week. Monday-Sunday, 8 hours TOTAL rehearsal time allowed outside of the school day.
Groups like Marcus, LD Bell, Duncanville, Westfield, Spring, Vandegrift, Reagan, Leander, Cedar Park, Johnson, Churchill (I'm just trying to think of the groups that have attended and placed well at BOA Grand Nationals in the past). These groups have done what they've done in significantly less time than the groups they are competing against nationwide.
IMO, if BOA ever decided to move Grand Nationals to Dallas, San Antonio or Houston, we would see a SIGNIFICANTLY different finals line up and several groups that are perennial finalists would be done on Friday. The actual Grand Nationals takes place in San Antonio the week before.It's an amazing line up of bands.