I use a vitamix blender. It's 5hp, commercial grade, will grind your wheat and also make smoothies. They are a little expensive but worth every penny.
I bought a herd share so that I could have good fresh raw milk. No way I could go back to store bought milk. You are so fortunate to have your own cow.
Every state has different laws about buying raw milk. You need to research how to legally buy it in your state. It is the most ridiculous thing not to be able to buy good wholesome milk.