Thanks for sharing your profile and your personal story. I think your story is an important part of who you are and that if you can weave it into an essay, that it would help your candidacy. Of course, you don't want to come across as trying to pull on the ad com's heartstrings, but you do want to tell your story and how it plays into who you are and what you've achieved.
I do agree that Duke is likely a stretch. The other programs are also somewhat touch - it's just going to be tough with that GMAT score. I'm hoping your story helps them overlook it. I would suggest adding a couple safer programs to the list - something in the 45-65 range if there's anything that is a good fit.
Hope this helps - I wish you the best!
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