I leave the layer pellets out for mine. If you are concerned about mice you can take them up at night.
I crumble up the egg shells and just toss them out for the hens. Mine usually don't leave any laying around.
I think that chicken scratch is what will attract the mice the most. Since that is just a treat only put out what they will eat in say 10 minutes.
Fresh water is important to all livestock. I change mine at least once a day. When it's hot more often. I would have at least 2 waterers for that many birds.
Good for you for researching poultry. I think you are off to a good start. Just having the birds is a learning experience. You will learn a lot of little things as you go. Like the best place to keep the feed to keep it clean, how much your birds will eat and what they like best.
Good Luck!