I have an old C.S. Bell # 2 grinder. Today I passed corn through it to make polenta/grits. It came out beautifully. However to make corn meal was considerably harder work. Today we were at a kitchen store, to buy a new peeler and my husband spotted some coffee grinders on clearance for $11. We purchased a Hamilton Beach Hands Free 15 cup coffee grinder. The top holds about a cup of grain. (They had a much bigger Krupps for about $50). I came home and ground 2 cups of grits into cornmeal. I got excited and put my flour corn through the Bell and rushed it inside. I ground one cup after another until I had 3 cups of fine corn flour! Okay, then the doors started slamming, I ground 2 cups of Farro, and 2 cups of oats. I haven't tried the wheat yet, or the milo, but I think it will work.
All for $11. Now, this machine won't be big enough for my CSA, but it certainly would take care of my weekly bread baking. I do 3 loaves and freeze 2. We go at least a day without bread, and have biscuits or muffins on those day/s.
So I've already met one of the hurdles of making small scale grain worth it.
My spouse is going to go back and buy a second one. He feels that for $11, I should put one in the cupboard, so that when I burn this one up, I'll have a spare.