I am in for $25 too.

As for payout, can we do a two-tiered payout as such (assuming an 8-man team, to increase if we have 10)
Regular Season
1st - 25% - 2x Buy-in
2nd - 12.5% - 1x Buy-in

Championship
1st - 37.5% - 3x buy in
2nd - 25% - 2x buy in

Under this schedule, if you win the championship and are first in the regular season, you still get the 62.5%