cosmic if they were living on a farm and trying to go self-sustainable, they wouldn't have the time to run a blog or home-school.
My family come from a very "off-grid" traditional farming community in another country that was fairly self-sustainable (in that they produced enough to trade to buy things they couldn't make). The nature of the work load, however, meant that women just didn't have the time to home-educate (they had to milk cows, make butter and cheese, make soap, brew vinegar, wash, cook, clean, look after infants, preserve veg and meat, make jam, tend to veg and herbs plots, make bread etc). So all the children in the community went to the local school building (a wooden cabin) and the mothers took it in turns to teach either a morning or afternoon a week.
And the thing is ... when you live like this, basic education, such simple arithmetic, becomes very important to acquire early on because the children have chores from a very early age -- fetching water, feeding chickens, measuring flour etc so they need to understand what quantities mean.
With couples like the Allens, I'm afraid all I see is a profound misunderstanding of the reality of things.