Can't speak about the first part, but I guess this is irrelevant to whether he lives or not (again assuming we are talking about dying from "natural" causes and not being in a car crash)

Don't you think that even with off-label medication, he will have enough chances to correct to make it for 5 years. My guess would be he lives a bit more than the average life expectancy for a man his age, just because of the means he has.