This is one of the questions we get a lot. People want to know if what we are doing is more expensive, as if the answer to that question might bring into question the whole operation. Here is how Barbara Kingsolver addresses this issue of food and cost in her book, "Animal, Vegetable, Miracle";
Grocery money is an odd sticking point for U.S. citizens, who on average spend a lower proportion of our income on food than people in any other country, or any heretofore in history. In our daily fare, even in school lunches, we broadly justify consumption of tallow-fried animal pulp on the grounds that it's cheaper than whole grains, fresh vegetables, hormone free dairy, and such...It's interesting that penny-pinching is an accepted defense for toxic food habits, when frugality so rarely rules other consumer domains. The majority of Americans buy bottled water, for example, even though water runs from the faucets at home for a fraction of the cost, and government quality standards are stricter for tap water than for bottled.
Kingsolver can be a little overbearing in her commentary, but I think she makes a good point. Eating less food and better quality, fresh food might be the most simple and powerful answer to our public health issues. It's been a good policy change for the Goodwin family public health initiative.