You obviously have no concept of what a farmer has to purchase. No way “theorectcally” would a farmer get by without paying sales tax.
>>It is Possible the Amish could come pretty close if they wanted to.<<
They do now. They keep their own seed, make many of their own tools and purchase very little other then some staples. Cloth to make their clothes and iron for horse shoes etc.
Born and Raised on a Cattle/Corn/Tobacco Farm and for us you are absolutely correct. The amount we had to spend on Equipment, Seed, Fertilizer, Chemicals, and fuel Forced us out of Business.
However I consider the Amish to be Farmers as well. Whether you till 40 Acres, Hundreds or Acres, Or even thousand of acres. If you raise your family tilling the soil you are a Farmer.