If you have enough savings, you can go with a 'high deductible' plan, in which you cover the first $x thousand dollars out of pocket, then split some costs with insurer, then insurer covers you after $y dollars spent.

The price is highly dependent on what state you live in. In North Carolina, I have a high deductible plan with a $5500 deductible for $270/month, which covers my wife and I, both older than you, and we're not in perfect health.

A side benefit is that if you use a high-deductible plan, you're allowed to put money in a 'health savings account' which is tax deductible, and you can use that money to pay for pretty much any medical expenses you have. It rolls over year to year, and can be treated like any other retirement account (investments, etc).

If you go with more traditional 'i don't ever want to pay anything out of pocket' coverage, you'll likely be looking in the $500-$1000/month range, again, depending on what state you're living in.

For a single person in Michigan, for example, it might only be around $200 - http://www.bcbsm.com/myblue/plan_individualcareblue.shtml but similar coverage with a 'high deductible' might only be $60/month - http://www.bcbsm.com/myblue/plan_flexibleblue.shtml