Not sure whether you are still active in steemit. Though the post is old, i dont understand your calculation of Scenario d. If you reinvest everything you mine in the first 12 months. You wouldnt have earned any profit. You would have reinvested all the bitcoins you earned to get more hash power.

How are you calculating the compound profit is 6,796 when you actually didnt take out any profit?
Shouldnt you have 0 btc, 0 profit and 60thz to start the next 12 months?
Also how do you derive the magic number 16,570 when you dont know the btc price and difficulty level till 09/2018?