In many (most?) families, both the father and mother have to work outside the home to sustain the household. How does one homeschool children when one works full-time? Answer that and you’ll make a billion dollars.
Lots of people hold down two jobs. Make one of them teaching your kids.
Drop the TV off at the dump and you’ll find some of that time you don’t have.
Both parents work to sustain the household? How did their household get so hard to sustain? Did a bigger house mean more to them than their children’s minds and the future of the nation? Or a car loan? An extra car, and extra wardrobe, for that second job? Entertainment, cable tv, dinner out, vacations?
People sacrifice to afford what they value. If they’re putting their kids in government schools, that’s a reflection of their values.
Anyone can afford to homeschool. Anyone.