I have yet to see any references in the news about him raising and selling cattle, sheep, hogs, etc., or growing crops like corn, soybeans, cotton, etc. AND SELLING THEM. If he doesn't sell anything, THAN IT'S NOT A BUSINESS. He calls it a ranch, but it's still just his private residence.
Dubya "working the land" as you put it, is nothing more than a useless photo op of him clearing underbrush to make him look like a "regular guy".
Just like Reagen chopping wood on his "ranch". Never read about him selling crops or animals raised there either.
But to you, all ranches == a business. I disagree with that completely.
And to answer your question, no I didn't grow up rural - just on the border of suburban and rural.