One thing to consider is will you be able to care for your parents? You could move back here, get a full time job then be expected to care for them as well. It might not matter where you live since you won't have time to do anything anyway

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Have they considered moving into an assisted living facility or senior condo type place? You might want to investigate long term care insurance for them as well so if you can't care for them, there are funds available to do so. If they don't have any assets then it doesn't really matter but just some things to think about.