"It's incredibly expensive to get into space, [..] That's the main hurdle."
Well, there's also the niggling little detail that you just might go boom trying to get there.
And when I read that, before hauling up the gigantic tennis ball, they first have to add an entire new module to the ISS, well here's me saying nope, won't happen.
Not unless they have an entire multiverse planned and we are on track for getting a dozen films with genuine weightlessness - which will likely get boring right around the second film, or the third at best, if the first two were good.
Bullet-time was an incredible gimmick when The Matrix served it up for the first time. It has rarely been so well used since. I'm guessing zero-gee won't fare much better.
Finally, they need to do more than break even if they intend to make more than one film. If, before you've even started filming, you've already slashed $200 million from your budget, well you'd better pray that the public is going to flock to the cinemas in droves to see your film because otherwise, that space module will end up as additional storage space until the ISS is decommissioned and sent to burn up in the atmosphere.