I understand pretty well, I think, and I'm not even an economist. That said, GPD is one of several imperfect measurements of total economic activity, and $1 billion (your number) in the context of $2.4 trillion is not much. The Texan economy will have no problem absorbing this relatively very small amount of expenses (a rounding error).
On the other hand $1 billion is a lot of money, and like you I want it to be put to best possible and efficient use.