Butter and milk that don't have to travel as far by road would be cheaper. So much of our national Walmartification is possible because of roads are subsidized.
No, it would not be cheaper. It is not cheaper today and making food today is profitable (and possible) only thanks to economy of scale. Automation on this level is not here yet.
> don't have to travel as far by road
It doesn't have to. It can (and it does because it's better).
