There are many ways to skin a cat, or so they say... Also many ways to make money with a camera like RED. Not everyone using it has to be a producer, director, filmmaker, etc.. I've incorporated RED into two of my businesses, neither of which involve filmmaking. ...Filmmaking is something I do as a hobby and it usually involves half-assing a script together the day of the shoot once I see who actually shows up to participate.As for your own projects this is something else. If you plan one project every year for the next 5 years and these projects will sell than you may return your investment at least from not renting a 35mm camera. But this only happen if you are a fruitful producer/director, it will not happen if you are having a Red for just having it.
Rentals are a tough way to go. I think if you have a decent RED kit, renting it can be a way to generate a little extra when you're not using it, but I would never go out and buy a piece of equipment like a RED One just for the purpose of renting it out. Unless I was already an established rental house just looking to pick up one more piece of rental gear.As for some of us who bought it for renting we will just have to wait and see but with a camera which is still fighting for its place on the stage and with 4000 others and two "sisters" that are coming you can not be too sure.