Not speaking "legally" but from experience.
So, bottom line question(s): when will he have to deposit $83 million?
He may not have to post the full $83 million. That is up to the judge's discretion.
When will EJC actually get it?
If she ever gets it it'll be "whenever she gets it."
Obviously, the $5 million from the other trial still hasn't been disbursed. How long does this usually take?
Not being flippant but there's no "usually." It depends on many factors, but generally speaking it can easily take years, if it happens at all.
I don't want poor EJC to die before it gets to her!
Sadly, that's a distinct possibility.