It does not matter where the Shindlers got their money from - it certainly wasn't from Terri's fund which the same could not be said for where MS got his money from.
There are so many hypothesises about the money connections between MS, Greer, lawyers, doctors, hospices and all the rest of the GIGANTIC conspiracy to "murder" TS one whould think there would be a LITTLE about where the Schindlers resources came from.