As I see it, this is a math problem. I would like to better understand your model and try to figure out how to "solve for X", as it were.
Do your calculations take into account A) the scheduled 20% annual burn of PRPS and B) the range of contract durations being 3/6/12 months ?
It seems like the burn will implicitly increase the value of PRPS by 20% each year, and increase the amount of Eth required as input by 20% each year (assuming PRPS / yr. purchase rate remains constant)
Also I haven't enlisted any PRPS into contracts, but I will assume that different tiers have different interest rates. I know that the distribution of contract duration will be scattered across 3/6/12 months solely on the basis of user variance. This must be taken into account, but does not appear to be.
Athene has said that after either 1 or 2 years he knows he will run out of money, if the "scam" does not take off. I want to figure out all the variables here, it would be great if you could share your findings.