This thread puts the price at between Cr 500 m and Cr 10 b. So right now the answer is anybody's guess
What we know for sure is it is going to be a large amount cos FD has already said so and, given the existing game mechanics, there is likely to be an upgrade path that will cost much more than the base purchase price. It is also reasonable to assume it is an "end game" item like the 'Vette currently is.
So my best guess:
- Cr 2 b base model.
- Top navy rank.
- Maybe some other special qualifying tasks to unlock (like engineers).
Don't think there will be a triple elite requirement as this will simply put it out of reach for most players and disincentivize (if there is such a word) casual players who are not really interested in putting time in some areas of the game just to gain elite3 status.