The main problem is that village/smithy is going to start tanking hard once you start greening so the only way to make it work is with 1 mega turn which requires a huge amount of buys and money, but it still has to be fast. The smithy/BM player should expect 4 provinces by turn 14 or 15 with a 5th and 6th in the next few turns, or at least some duchies, and can probably secure half the VP's by turn 18 or so.
Would you go for Village/Smithy/Goons/Chapel?
I suspect Goons might be the best way to make village/smithy more viable that smithy/big money, since there is essentially an unlimited number of points to be had and the smithy/BM is going to take some time to run the game out on piles. The trasher might not even be necessary but then you will run into the same problem of the engine stalling hard once you start adding useless coppers. I think watchtower might be very helpful here.
The problem here is that this engine really has nothing to do with village/smithy. They are simply enablers for the real players: Goons and watchtower (or chapel) and this combo works with any sort of draw engine of which there are thousands (millions? billions?) of which village/smithy is one of the worst.