I am skeptical. Their website makes claims, but I see no substantiation or cross check. I could make a nice website, post some verdant photos, and make some Excel charts. Some or all of you are free to believe them and stake your family's future on 1/10 or 1/16 of an acre.
Theres Video on Youtube of this very familys garden home on 1/4 an acre if you dont believe it.
Its inspiring, and was on the News as well.
6000 pounds of produce, they have a few goats and rabbits too.
It just goes to Show you what hard work can do.
And some aesome gardening skills.
Their entire yard is edible. And I mean edible, and they sell surplus at organic restaurants to pay the bills.
let me know if you wish to see it, I will link it, But I also want you to eat some crow first.