I mentioned this in chat but so far I have only heard Brian, Tay, and Shinji talk about wanting the money. I think Jimmy will be able to stay because he has grown up in way shittier situations, but he also seems to be throwing more tantrums and antagonizing production which could be a problem.
I think they would really have to press those four to have an interesting dynamic if they wind up being the final four, with Brian driving it. He has plotted against Tay while being really nice to her face and I think is beginning to do the same to Jimmy. Tay and Jimmy have talked shit on each other (well, Jimmy screamed) but they forgive/forget it quick. Shinji is adored but just there, his only push will be in physical challenges. Jet made it very, very clear he likes Shinji. Nearly all the fans do.
They desperately want Cole to stay and I understand why, and I think they will move mountains to make it happen, but dude's heart is just not in it. They will have to coddle hard to keep him and I think people will turn on him after so many times like with Jon.