With the current options for health insurance plans, this depends largely on your other expenses.
To explain, your "income" in early retirement is a combination of money you're converting from an IRA to a Roth IRA, capital gains (as you sell investments to cover expenses) and dividends on your taxable brokerage account. If your expenses are in the $40-50k range annually, you might only be paying on conversion income, and relatively low taxes on long-term capital gains. Overall, you can qualify for health insurance subsidies at this level of taxation, and get a pretty good plan without a lot of out of pocket expenses.
Here's one example of an article going into the details: