Since Lauren’s parents have not brought up the issue of money (and they seem to have money to spend on attorneys, etc.), we must assume that it is not a factor for them. I posted a link to pictures (some of which the judge has now ordered Mr. Richardson to remove) that show her in front of what appears to be a fairly nice home with a show-quality classic sports car.
Many upper middle class families have the means to spend $31,000 per year without any government help (though they would certainly receive a portion of it back as a medical expense on their tax return). It might mean a less extravagant lifestyle, but it can be done.
I agree with your previous bottom line. Money is not a moral or ethical issue here unless someone makes it that. You and I haven't done that. We haven't said that anyone owes them the expenses in order to preserve her life.
The issue is can someone petition the government to end her life and will the gov support that petition on the basis that her life isn't of value?