I think that you have a lot to talk about in your profile, which is good. Any ways that you can show how you grew and took on additional leadership roles at work will help your app a lot.
I think you certainly have a shot at the top schools, but keep in mind that their acceptance rate is typically in the teens, so definitely spread your bets. I understand why you picked Thunderbird, but I'd actually recommend adding one or two schools to your list that are more in the Haas/Anderson/Fuqua/Stern tier (not necessarily those schools, given your interests)... Those aren't easy to get into either, but I think they could help you more than Thunderbird. Also, since you want finance and a school with an international reputation, Columbia seems lke it would make sense, and also Sloan. But, you may have geographic reasons for not choosing those.
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