I would say that a healthy instructing of children how to work -- from an early age -- is not only key to being able to homeschool, but also key to being able to lead a normal (one-income, no birth control) Catholic family lifestyle.
That's rule #1 if you're going to have more than about 2 children: they HAVE to carry their own weight. As soon as they're able, they need to help out. It's only fair, and life isn't about play, play, play AT ANY AGE. This is the valley of tears. Once you're done with school, you work. Even in old age, you have to worry about your health, and your children and grandchildren. Plus you might be volunteering at Church. You never get to just sit around and "play" all day.
You get to rest in Eternity -- not before. :)
Also, for a Catholic, one of the most important things you teach your children is MORTIFICATION, or "doing that which you don't want to do" (very closely related to "NOT doing that which you WANT to do").
One of the main advantages to country living is that parents are forced even more to teach their children to work. That, along with a more "natural" environment, is the primary advantage of such a lifestyle.
With city/suburb living, life is too convenient. You don't have to require much of your children, so many parents don't.