Agreed, this is strictly a "could be" with no evidence to make it any more than that. "Encouraged" is probably impossible to quantify- I don't know how you could ever prove (or disprove) the possibility that, in response to Oswald's "I’m going to kill Kennedy for this,"* someone (or several someones) said something like "yeah, that's a good idea! Go for it, we'll help!" outside of showing a help that went beyond mere encouragement. As for the financial support...that would be easier to quantify, since all you'd need to show is that he did something that he couldn't have done without it. CTists have been barking up that tree for fifty years without ever scaring down any evidence he did; he lived on a financial ragged edge pretty much the whole time after he returned to Texas from Russia, and there's nothing to show he ever had or did anything outside what his own limited means could accomplish.
*And this is taking for granted he really said this. I actually gave his words a better evidential provenance than they deserved when I said "an FBI memo which quoted a 'confidential informant' quoting Fidel Castro quoting Oswald as having said...," since, unless we assume Castro was there in the Embassy to hear Oswald's words himself, the correct formulation would be "an FBI memo which quoted a 'confidential informant' quoting Fidel Castro quoting an unknown source quoting Oswald as having said..."- hearsay at least twice removed.