In a large bowl, or in the bowl of a stand mixer, combine water, milk, sugar, and yeast. Let sit for 5-10 minutes or until foamy. Stir in butter until combined. Add 5 cups of flour, and mix by hand or with the paddle attachment until the dough is rough. Continue adding flour, 1/2 cup at a time, and blend with the dough hook until a smooth ball begins to form. Knead by hand for about 10 minutes, or by machine for 4-5 minutes until a soft, smooth ball of dough is formed. Cover dough, and let rise for 20 minutes, or until the dough is full and puffy. Gently deflate and divide dough into 24 pieces. I divide the dough in half, and then divide each half into four pieces. Then, I divide each piece into three pieces. Shape into a ball, and place each piece in a well-greased half sheet pan or in two 9x13-inch pans. Cover, and let rise for 20-25 minutes, or until well rounded and full looking. While the rolls are rising, preheat oven to 350F. Bake the rolls for 18-25 minutes, or until golden brown and an internal thermometer reads 190F. You can brush the baked rolls with melted butter if desired.