In my country(Panama) it is legal to live off of the grid and there are many people that do so in rural areas. Many of them survive from collecting (and sometimes filtering) river water and cooking on gas grills. Propane cans are subsidized by the government so the rural poor do not cook on bonfires. Certain types of tropical fruit and root vegetables are easily grown in their back yards and big sacks of rice are cheap and also subsidized by the government. If you are OK with living like that you can also set up solar panels to charge your phone and laptop and use cellular Internet for $10-20 a month (depending on data usage and speed).