I think the main idea here is not to force factions upon players, but to make the whole capship procurement procedure more RP-centric than it currently is.
As to the "putting the cart before the horse" comment, in case of official factions, like say, the Navy. It's the navy who'll commission the procurement of these objects to a trading faction, and not as individual. Then the ship, which belongs to the navy, can be passed on to a suitable player, based on merit.
And if there's an individual buying, well then he's gonna have to bear the brunt and do the accumulation himself isn't he ?
The navy's not gonna be making ships for every tom, dick and harry out there.
As for the concept, excellent one I'd say, but I can't comment on whether something like this is possible or not...