Its not the question of where would FIRST like to hold it, but what places will let FIRST use their stadium, convention center, etc. If FIRST would have a choice where Nationals could be, im sure it would still be at Disney [if at all possible], and this debate and anxious waiting would not be going on.

Also:

Most likely [if the championships were Houston], the astrodome would be the location [if FIRST used a stadium], since it is now dormant to professional sports [since the Astros now have Tropacana Field ]. There is too much of a risk to FIRST if they tried holding it in a stadium that is brand new, and used several times a year for its primary function of football, because if something happened, the Houston Texans upper management & FIRST will have to worry about fixing the surface (or any other part) of the brand new NFL stadium. Stadium repair isnt cheap, and FIRST really wouldnt want throw away money for that.