595 for me, seems kinda high. But I agree it leaves a lot out of the equation. It doesn’t address a lot that I take into account for preparedness.
I don’t have a generator in the house, it’s in the garage (as are tools and some food that is tolerant to freezing) so I don’t know if it really counts if you have something available to you that is not stored within the walls of your house.
I calculated it with and without the generator and the generator only added 3-days.
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You can run, but you'll only die tired.