Since the price of color film has been going up, I was thinking of loading some cine film by myself, such as Kodak 50D, 250T, or 500T. One roll of cine film can produce about 70 rolls of 36 exposures 35mm film. So each roll is about $8.5 with Film cartridges, which is cheaper than the cheapest 35mm film on the market. But I won't be able to use that much by myself, so I can only implement this plan if someone else is also interested.
Also I’m able to do the film development with C41, even slider film with E6 (but currently running out of chemicals).