If her ex-husband is really that concerned about her then let him forgo ANY monetary gain he may make (or is offered). That in itself would show the sincerity in his heart. Right now I doubt it.
I'm one who has always believed that it may be just as morally wrong, when you have anyone who is in the condition like this woman is in (brain dead) and needs a machine in order to keep certain bodily functions/responses active, and could not do so without that machine. That is not life. At least not as God intended IMO.