Allow me to answer question number 4 for u HELL NO , that "calculator" doesn't account for the difficulty increase and its calculating from a price when BTC was more then 10k a piece.
Given that you are pretty much against this project in general, I think I will wait to hear from Dias on all of the questions that I put forth, thanks.
He had time to Delete my post but not to answer your questions that should tell u all u need to know.