What I say is do the best you with what you got and dont' wait until you can afford shooting with film. If you know your craft you can get very good results with anything. And if your story is interesting, people will get over the "lesser-film-lookishness" of it. More and more films are being shot on video "The aniversary party", "28 days later", "Pieces of april", I could go on forever. A guy in South Africa shot a feature lenght with 8 cell phones!