There are a wide range of plans. What kind of plan are you looking at? And, are you considering your total costs, or just the premiums?
$1k is plausible, but they can be much less. Bronze, Silver, or Gold? HDHP, or not?
Is $145k your planned income next year, or this year? That's a hell of a lot in just taxable dividends. (i.e. not a 401k / IRA) Working / salaried income means nothing once you FIRE. Don't be afraid to state something completely unrelated, as long as you can show a plan as to why. You are at a major life milestone, so big changes can happen.
My #1 tip: check to make sure any plan you are considering has the doctors, facilities, and prescriptions you need and want. Network depth is a way to cut corners. And it's nowhere near as easy as a workplace plan, at least for a major employer.
And if you travel a lot, consider that too. I have no plans available that cover more than mandatory emergency care outside of our metro, so we buy travel insurance, even in the US now.