The cost you're referring to is not a maintained (constant) cost.
Its a one time payoff.
The credits you pay for the Ex.Fab are reimbursed by a "X" amount of trades.
What I'm talking about is a required constant cost - i.e. additional recipe material - that would have the player travel and interact with other players, instead of slapping PoBs at sell points and shooting NPCs in space - tho we all love it at one point, cause interaction is limited and gets tedious.
I understand the need for an economically (comically) viable recipe for extra protos, since guns (especially cap guns) take a lot of time to craft; but these recipes, in their current forms are over powered, credits to time spent.
Not to mention, I'm making Volgrograd Ordonance without any use of anything related to Coalition or Arms / Munitions.