Chemicals can be fairly cheap when buying in bulk. Considering the time and effort putting into each roll of film at the time it was shot I would rather be more conservative than trying to save a dollar or two for each roll of film processed.
The way to save money in chemicals is to buy bulk. C-41 chemicals unused unopened will remain good for 2 - 3 years easily. I bought C-41 LORR developer replenisher in bulk. That's what was available from a wholesale supplier. A bottle of LORR starter was about $8 and will last for years. Each time I mixed and make 10 liters of developer. I used it up in about 2 - 3 weeks. By doing this I can be as conservative as I want in terms of developer capacity (number of rolls per liter). It is still very economical and the joy of turning out top quality negatives is beyond imagination. Don't try to cut corners in using chemicals. If I remember the cost correctly it is about $2.50 per liter of developer.
I believe even for non professionals smaller sized bulk chemicals will become the trend. It is more economical for Kodak to produce and cheaper for consumers to buy too. Anything smaller than 5 liters is just too small. The LORR developer replenisher I get makes 4x10 liters. It costs less than $100.