I can't speak for the OP but, since you are a contractor and not an employee, wouldn't you get your health insurance in exactly the same place as all the other independent contractors do in your country?
[Edit to clarify because this is being downvoted: many countries require that independent contractors buy private health insurance. Germany, where I live, requires it. As I understand it the situation is similar, for different reasons, in the USA. So independent contractors are very often all in the same boat, insurance-wise, but that boat varies by country.]
In the US, you can buy medical insurance from the same mega corps that offer it through Fortune 500 companies... its just not subsidized by your employer so you pay larger premiums.
They might be the same corporations offering coverage, but the plans are different. It isn't just the employer subsidization that you need to factor in, but that you as an individual will never be able to negotiate the terms of the plans you're offered, nor will you be able to negotiate for group plan rates.
You pay the whole premium more like. The plans in the state exchanges are pretty decent at least in WA. Gold level plans are about equal to a decent average company plan (not like a Google level one)
[Edit to clarify because this is being downvoted: many countries require that independent contractors buy private health insurance. Germany, where I live, requires it. As I understand it the situation is similar, for different reasons, in the USA. So independent contractors are very often all in the same boat, insurance-wise, but that boat varies by country.]