https://www.notechmagazine.com/2020/04/self-sufficiency-defies-common-sense.html

this guy got it right (but its semi-civilized way)

1. you need capital to live off (material, such as house and tools, these will serve forever)

2. you need some property like land

3. you need SOME money to buy things you cant produce (salt, items, computers, repair etc)


if you have some 1000$ in youre bank account this might be enough for entire life, the rest you can grow or build or use