A few things to note, ECN-2 film is not anywhere the same as C-41 and the two chemical processes are not interchangeable, in addition the vision three has a remjet backing wish you will have to learn to dissolve and wipe off before you can actually see an image on the film. Thirdly you're going to have to mix your own chemistry, it's very hard to find pre-mixed ECN-2 chemistry, you have to buy the bulk chemicals individually and make sure I don't in order to soup this.
Thirdly know the 400 foot roll does not fit in any bulk loader, I've tried trust me, however there is a bulk loader that does take 200 feet of film so you'd only have to split the role once, I've already done this though I was fortunate enough to get the film for free, and also that I didn't have a full roll I only had an end role of 190 feet so I didn't have to do any separate rolling so as far as that's concerned I have no idea but I don't want to even think about it because it sounds like a nightmare to me.
Anyway this is what the bulk loader looks like...
It is called an Alden 200.
They aren't easy to come by, and they're much more expensive than the regular bulk loaders.
But most importantly again I want to stress how you have to make the chemistry yourself, and then you have to also dissolve the rem-jet backing, it's something that they put on movie film, and also they used to put on Kodachrome, it's not terribly hard to get off, but it isn't exactly easy either.
I only did this because I got the film for free, however it's a pain in the ass and I wouldn't suggest doing it if you have to pay for the film.