According to a friend of mine who owns a hangar at TKI (McKinney) there is a waiting list of about three years for a hangar. So you might to get your name on the list now if that's your preference. Obviously that can change depending on the hangar, the owner, etc.
Another thing about McKinney is depending on where your hangar is located you can have some pretty long taxi times. I temporarily based my -8 there a few months ago and was located at the south end of the airport. Prevailing traffic usually uses runway 18, so lots of taxiing.
Not sure about AeroCountry availability, but certainly it is more conducive to shorter taxi time and no jet traffic.
Chris Pratt (2018 VAF DUES PAID)
RV-8 Flying, 750+ hours
Lycoming O-360-A1A, Hartzell CS
52F (Aero Valley Airport, TX)