I just literally emptied my life savings into a RED, so I think I can answer this.
The RED is the biggest favor anyone has ever done for people like us.
Basically, there is a certain minimum level of film quality that you need to get pro work or make a saleable film.
Until now, there was absolutely no way any of us could afford to reach that quality. 5 years ago the cheapest digital movie camera you could buy started at 110k body only, and required a 60,000 dollar tape deck.
Ultimately, virtually all indie filmmakers were doomed from the outset to produce a maximum output quality level of "complete garbage"
Starting in about 3 months, you can buy the same camera James Cameron is using on Avatar 2 for 28,500 dollars.
It's not cheap, but it's now within range, if making great film is all you care about, this costs less than an SUV, and there are 30 of those parked on my block. That's change.
Is it really that much better? Oh, god yes, I've shot on RED, met the inventor, and gotten color grades as good as the 300 or the matrix out of the raw clips they gave me. It's better than the cameras they shot SW episodes 1,2,3 on.
Similarly, the 5D is a fantastic training cam, and can even be modified to pull focus.