I'm not sure about the economics of it, but you might initially save time (and money) by sending the film to a lab while you adjust the rating, color, etc. to your taste. If you do this, I'd recommend sending the film to a competent, consistent lab - not "Spike's Pretty Good Barber School and 1-Hour Foto Shack." I'd also recommend, from reading and from experience, making two identical exposures and sending the film in batches (the power went out and they dropped the film - ruined some of it).