Well, it's at a point for you industrious types that you could guarantee a win with access to 350 million +/- in capital and an organized, competent labor force to fill out entry forms.
Cash payout is 806 million, which leaves roughly 483.6 million in after tax winnings. So, less the 350 seed money and call it a million dollar organization and labor effort, you'd have about 132.6 mill in after tax winnings just from the jackpot. Of course, you'd win all or split all the lesser prizes as well because you own literally every possible combination.
Crazy amount of money to even contemplate winning. To go from middle class Joe to half a billionaire over night is insane.