The CAF has about 60 'bases' scattered across the United States, where aircraft owners and pilots prefer to have their affiliated aircraft close to home. About 20 of those bases are located in Texas
The Cavanaugh Flight Museum at ADS
has a nice collection of aircraft, and worked a deal with the CAF to keep the B-24 Ol'927 and the B-29 Fifi at the museum when they are not on tour.
I've talked to some CAF members over the years, and while they greatly appreciate the reception and relationship with the Midland/Odessa Airport and the people of that community - it is a bit off the beaten track for tourists.
Creating a 'National Airbase' in a major metropolitan area will bring the CAF to more people, making it easier to attract the necessary level of funding to keep the aircraft maintained.