Everything remains very simple to calculate until you bring the goat into
the formula.. While a human can raise his food in a cultivated plot of
ground, livestock require acres of vegitation to survive.. We all think of a
goat or pig thriving on kitchen scraps. Not nearly enough, especially since
you are going to be only one person and living on a vegetarian diet.

You most likely will have to purchase feed for a few chickens to be
productive. Raising grain requires additional land plus equipment and labor
to just raise it for your livestock.

Also, just a question. How will you maintain an internet connection if you
are off the grid??

Steve