If you want to encounter expense, try printing your own digital prints on a high quality digital inkjet printer.

It is also best not to price things out based on $/image, unless you are doing something high volume like school photos or catalogue shots.

Four rolls of 645 negatives or slides would generally give me lots to work with - in the day, that would be at least half of a wedding that I was shooting as the "official" professional photographer.

By the way, I think "Ethics and Philosophy" would be a good forum for this.