It could be a case of striking while the iron is hot, if the land is available now while the economy is at a low, then that would be the time to buy it. If a private party or a commercial concern where to buy it, the land may be tied up for generations as it is handed down over and over.
TPWD mission statement: "To manage and conserve the natural and cultural resources of Texas and to provide hunting, fishing and outdoor recreation opportunities for the use and enjoyment of present and future generations".
It seems that this purchase is for the future generations, with any luck some of the current ones may get to enjoy it as well.