I'm not too sure about investors, I mean Inferno was handled, badly at that, by 20th Century Fox! lol - Maybe he worked better when it was just his father and brother over seeing the project, but I personally think it's more to do with him not writting his own films any more!
He was also given free reign with Masters of Horror, a lot of fans didn't enjoy what he did with that material he chose; I did however!
