The Washington Post article contains the most information, but would have had to be excerpted.
Cost is a legitimate concern, but isn't a consideration. Whether because of insurance or personal assets I don't know, but the parents are able to pay the bills.
Utilization could be a concern, but the pediatric intensive care unit has 20 of 32 beds occupied, so apparently isn't an issue.
It boils down to who makes the decision, the individual or the state. I should note that the parents position is a conventional Orthodox position.
Obviously utilization of resources is a major concern here. If he is taking up a bed that could be used by someone who can actually be saved, then they need to pull the plug no matter what.
However, if the family is not paying for every cent of his care then the hospital has a right to make the decision.