In my opinion, Australia is famous for its warm wheather which is suitable for the growth of grass of high quality. It bring about lots of food for cows. So today my advice for you is raising cows. Now in the world, more people are seeking for milk powder of high quality although the price is expensive. It is well known all over the world that milk powder made in Australia has a good public praise . That will make people trend to purchase milk power made in Australia when they choose to buy milk powder. So the first benefit of raising cows is your products is competitive. Another benefit is that feces of cows can be made to sewage gas . sewage gas is a clear power and it has many functions. After being made to sewage gas , the dross can be excellent fertilizer for growing organic vegetables and grass. You may see it creates a optimum cycle that is advantageous to the environment. So if you have enough land , raising cows is a better choice.