Cabbage is quite easy to grow and stores well hanging in a root cellar as do many other root crops and winter squash type plants. Corn has to be dried to grind, air dried in a crib works but attracts mice rats etc.
These grain mills can be motorized or bicycle hooked up, will do lots of different grains even heavy enough for animals. I have a small hand crank grain mill for making wheat bread, about 200 turns per cup of flour, way too much work to feed any livestock.
This one is a bit pricy, something like $850. out of my league. Available from Lehmans.
Sawyer
These grain mills can be motorized or bicycle hooked up, will do lots of different grains even heavy enough for animals. I have a small hand crank grain mill for making wheat bread, about 200 turns per cup of flour, way too much work to feed any livestock.

This one is a bit pricy, something like $850. out of my league. Available from Lehmans.
Sawyer