Very interesting.
Although (Corrected) 0.01214km2 of prime, fertile land is quite a large footprint for a single person to live 'carbon neutral' and 'almost money free'.
What if every single person on the planet wanted to live that way (I do, for sure).
We have 7,200,000,000 (7.2 billion) people on this planet, and 0.001970000km2 per person (
source) of arable land of various quality (how much of that is highly fertile and capable of growing crops without high-intensity machinery and synthetic fertilisers is another question).
Not much, right?
As much as I love and support the back to the land ethic, and aspire to it myself, I am also a big supporter of using technology to grow foods intensively within urban areas with a significantly smaller land, resource, and environmental footprint. Indoor vertical farm buildings, aeroponics/aquaponics etc are all good options.
Unfortunately for some our diet of processed, unhealthy and/or high mile foods and the way we live has an expiration date. Even vegans are guilty of this, many buying plant based foods that have been inappropriately grown in drought struck areas (eg California) and then shipped thousands of Kms to a store on the other side of the continent/world for consumption. Growing local and eating seasonal produce (although indoor production addresses this) might have to be the future.
Regardless, I'd definitely be interested to watch your mini-doco.