It is definitely possible to play Coppersmith more than 54 times a turn. Actually in my turn I could have gained the last BoM and Coppersmith (in the right order) earlier in the turn which would give me ~1000 more coins. And you can play coppersmith even significantly more than that (
see here), but I'm not sure whether that is worth it:
(1) You need pretty much kingdom cards to play all your copper multiple times: Black Market, HoP, Mandarin, some mega-drawer (madman or countinghouse + discarder. The discarder can be chancellor, scavenger, sage, rebuild, hunting party, golem and probably some others). If you only use madman, then you probably cannot do this 10 times, because you probably also need ~2 madman to draw your deck initially. But that may be okay, and the fact that Madman is a village is also very nice, because...
(2) Most things you're trying to do is terminal, so even with KC the number of actions you have is pretty limited.
Also, for the optimal solution you need to be able to control the Black Market deck, which you cannot do currently (without hacking into the code yourself). But yeah, you might get some better results by adding Procession + Graverobber (and maybe Rogue and/or Throne Room) for some of {Scheme, Counting House and Chancellor}. The other 7 kingdom cards are really necessary (and life will be much harder without Scheme, but maybe you can do it with just 1 Scheme from the BM-deck)
This post may be a bit incoherent, because during the post my opinion changed from "meh, that won't work because I need all kingdom cards" to "ditching Chancellor+Counting House might actually be worth it"