Add in that my freezer probably contains over $500 of food (and the fridge has less, but not none.)

Usually you can buy ice, but when I had a ~36 hour outage a couple years ago, I couldn't. Most stuff was fine for that long, but 2-3 days would've meant tossing pretty much the entire contents.

(Plus, I don't have cell service where I live, so being able to power my router is pretty useful.)

This is probably a bad move if you live in a city. It makes more sense in rural areas.