I think my folks paid about $14k. That was 4 years ago? Possibly pandemic pricing, but I doubt it's gone down.
That's for a whole home unit that powers your entire breaker panel. You can choose a smaller unit and only back up, say, some of your breakers. But the savings are not substantial, so most now go with the whole home units.
The unit is solid. Starts once a week to keep everything lubricated and ready. Power goes off, generator goes on. You lose power for a couple of seconds. Maintenance is basically oil change once a year and air filter the same, I assume. The company does the first change, then it's a maintenance fee. I told my dad I'd change the oil, but he still has them do it.
Trust issues. To everyone else, I'm this hyper-capable engineer who can build or fix anything. To my dad, I can't tie my own shoes.
Not really, but it feels that way over some things.