Don't assume that just because you won two 180 man today that you'll continue to win one a day. I would guess a 50% ROI to be possible at the $4, which would require playing 100 for a $200/day return.

Good luck, but it's very easy to project forward when you're running well, and it will hit you 5x harder when you're running bad.

Also, (and I think you're getting it), but just because you win a MTT and have a bigger roll, doesn't mean you should be playing the max stakes for your roll.