One factor in his decision would be the notion of "lifetime maintenance". This would include picking up every nickel of every whackjob treatment that the Schindlers could ever dream up that wasn't covered by medical insurance (no doubt all dried up by now), or Mediscare (pretty stringent on what it pays). All collectible under the contempt powers of the court, which includes jail time. It doesn't matter what the Schindlers promised - the divorce court would insist on large pay in maintenance, and assign him 100% of those uncovered medicals. To top off the joyous occasion of having this obligation, maintenance is not dischargeable in bankruptcy, and a chapter 7 wouldn't get him out of collection efforts in the future.
And of course, he'd lose the ability to control any aspect of his future medical obligations to her care if he turned it over to the Schindlers, and to them, no expense is too great to them - at least, not so long as somebody else is picking up the check.