I believe, that investment should start from small amount and observe how it goes. From there, if there is good progress with your investment, perhaps you may able to add more investment and monitor it's progress from time to time. Later, you will be surprise of a better reward in the end.
Actually, it's not necessary if you only want to invest in the long term, because in the past many people used only very simple capital which eventually turned out to be big, which means that they are very focused on their investments from very small sizes even though they have to take time which took a very long time to get big.