The younger you are, the cheaper the insurance is. That price is supposed to stay level for life. So your premiums aren't guaranteed. How much coverage you need. At a minimum, insure for the difference between how much you can afford to pay and what the nursing home costs.
Many people insure for the entire daily cost.
How long you need coverage. But that's money well spent, just in case you're one of the unlucky 10 percent who will stay that long. A lifetime benefit costs 25 percent to 50 percent more. You can lower the cost by accepting a long upfront waiting period before benefits begin. You want comprehensive care.