I did a lot of reading mostly here on RC about elegances and here's what I got out of it. The aussie ones are not hard to take care of, only the ones harvested in the indio region.
The threads general consensus was that a few years ago when they harvested them in the indio waters they came from shallower areas than they do now and would do OK in a aquarium, the ones they are harvesting now are deepwater and much harder to get to live.
The aussie eleganes are pretty hardy, I've had one for three months now, just accasionally feed it, its looked great since the dayI got it and is growing.