The cost of shooting on film is not just limited to buying the actual film.  Frame scanning can be an extraordinarily expensive process.  James Miller demonstrates a very effective and inexpensive way of processing his 8mm film using a Canon 5D MkII.
Digitally Process 8mm Film with a Canon 5D MkII

That’s really something. Thanks for posting.
What kind of projector are you using? I have a Canon D60…