Don't ever bank on an inheritance, it rarely pans out, Granny could be mortgaged, have other debts, other creditors, or she could even been silly and taken out a reverse mortgage or she may leave it to charity, DO NOT COUNT ON INHERITANCES, period. Other than that, do what makes you happy and what you can afford, but again, get the inheritance thing out of your brain, it most likely won't be what you expect.
If the inheritance comes your way, great. Figure out what to do with it when the time comes. In the meantime, build your own life.
Moving away from all you've ever known feels daunting, but keep an open mind and chances are good that it will also be a great personal experience in the end (I have changed continents, and while it was hard at first, I regret nothing). So I think if the only thing holding you back is fear of leaving familiar territory, I'd say go for it.
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