Maybe the grandma brought a winning lottery ticket with the money that Miles gave her back. And that's how she got from California to New York. Sheesh if it was me I surely wouldn't of moved to New York I've lived in California the weather is much better than New York I'm sure, maybe the smog is just the same.
I'm just having some fun with this one don't get harsh with me okay.
Peace Out

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Standing in the ocean with the sun burning low in the west
Like a fire in the cavernous darkness at the heart of the beast
With my beliefs and possessions, stopped at the frontier in my chest
At the edge of my country, my back to the sea, looking east