Hi Sholanki,
Thanks for writing in. It's difficult for me to give specific recommendations on schools without knowing more about your background, work progression, and goals. In regards to your GMAT, you can look at the middle range of each school you are targeting on their web site and see if your 560 falls in that range. I think your strategy of targeting regional schools will be more effective though, as Thunderbird will likely be a reach.
Best of luck,
Daniel Richards
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