I thought this was already clear? Org K$ * vzcyvrq cebonovyvgl ba rirel grnz. Lbh ner thnenagrrq n arg jva bs K$ * (1 - fhz bs nyy vzcyvrq cebonovyvgvrf).

What you really should do though is look at the past history of the tournament and the form of the teams, figure out which of those teams with silly odds have a decent shot at winning, take a risk and bet on some combination of them. You should stand a fairly decent chance of winning really big (unless this huge spread is actually justified, which seems unlikely).