Call me cynical but whenever I hear "Lifetime profits!" I immediately think it's some sort of Ponzi-esque scheme. I don't need to know who your private investors are but why was the private pre-sale only limited to certain individuals or groups? I know you're looking for investors but what's to say that the 2nd round of pre-sale (as well as future rounds) isn't a means to pay back the 1st round/prev. rounds of investors?
There's only a finite of space you have in that mountain and eventually, you'll run out of room to add more miners. What will you do then? Why are you adamant on mining only Bitcoin and not other alts? What will you do when the hardware becomes obsolete? I'd like to know more about the actual business operation/development rather than the potential profits.
This all sounds too good to be true, I'd practice due diligence and research more background info on the ICO team.