He bought the ranch just as he was running for prez to create the image of a being a folksy "real guy". After he was selected (not elected), broadcast reporters always had to do their live shots with that crappy lean-to in the background to further perpetuate that fake imagery. Give the guy and his handlers credit for being the masters of deception.
It must have been hard work herding and corralling all those brush piles. But where were the animals Georgy ? Boy, you really fooled all those Texicans into believing you were a real cowboy, even though you spent most of your life in plush oil company offices in the city.