Well you are the perfect candidate for cloud mining. Full of assumptions and in need of hand holding, you don't want to do any work, just want to give someone else your money and forget about it while you watch your "profits" go up.
Unfortunately no one in their right mind would sell (or lease) an asset such as mining power for less than they expect it to earn for them. This means that while you can "take part" in cloud mining, all you're really do is at best making someone else an bigger profit faster or at worst you're just funding a ponzi scheme.
How much to invest and how much profit we'll get? Can you care about that?