Betting the KY Derby

[Seattleallstar]

So I love Alpha and want to play him in a tri. Would it be better to spend the money I would have on a tri ticket where I feel i have coverage for third, or should I just put Alpha down to win? I calculated the first ticket I wanted to play with coverage I felt comfortable with and it came to $90 dollars. If Alpha is in the double digit range arent I better off with a win bet? I have 5 horses for second place and I wouldnt feel comfortable leaving one out for the sake of having a cheaper tri ticket?