This is interesting....
I just priced out the cost of chemicals buying from B&H (which sells Photographer's formulary stuff) and it came out to about $50 for tens of gallons worth of the developer mentioned in the note.
So this is definitely a "GO".
I'm sure there are cheaper way of getting raw ingredients but for small qty, this is easier. (and still cheaper)
Is this formula expected to last a while in tightly capped bottles? Or is this basically mix what you use today kind of thing?