[bialpio]

You may want to revise the life expectancy estimate on a rice+beans diet, scurvy is a thing and based on my googling you would not get enough vit. C. I'm probably missing some other disease too, so "don't get sick" is probably also out the window on this diet.

One can of beans is ~400kcal and costs ~$1.30+tax in my closest QFC, so you need around $4 per day just for beans (3 cans). 5lb bag of rice (50 servings, 160kcal per serving) is $5.50, & you need 5 servings per day to reach 2000kcal, so +55¢. That's $135/mo just for rice and beans, and I have not checked if that satisfies daily protein intake needs.

Where will you set up your tent without getting arrested? Needs to be walkable from a Goodwill, otherwise you need transport once a year. How are you cooking the rice? Where are you getting the potable water from?

Decent sleeping bag is another $100.

Even your unserious response is underestimating the amount of money required.

[bluGill]

Bags of dry beans are a lot cheaper than cans. there should be room for a few vegitables in the budget.

[bialpio]

Not if you have to pay to set up your tent legally, which you conveniently forgot to respond to. The only place I found so far that is free is BLM dispersed camping, but they allow only 14 consecutive days in 28 day period, and those places are far from civilization, so buying those beans is going to be a challenge.

Sorry, but with such an outrageously low estimate (US poverty line is $15k a year), you have to put in a bit more effort and show some receipts.