Very interesting topic. There are various legal and structural mechanisms available on how you could theoretically realize such an initiative (a joint venture or special purpose company come to mind). The significant challenge to overcome is for all the parties to agree on the specifics (where to buy, how much to spend, the logistics of everything etc.). Thinking out loud it would be actually tremendously valuable if you had a company that managed the logistics for you without any vested interest in where you buy and how much you spend (i.e. no conflict of interest).
Keen to see where this conversation goes.