This card works great with Library or Minion. Play all your money, buy Villa, play Library/Minion, continue ...
This card works great with Tactician !
Almost certainly useful here and there, but the idea of trying to build an engine that requires the purchase of a particular card to trigger terrifies me. Knowing that my opponent could run out the pile to kill my engine, and that even if he doesn't, I've only got a limited number of triggers anyway, isn't a good thought. Now, throw in an Ambassador to resupply it, and you may have something. It's still probably more finicky than Black Market + Tactician, but it's still pretty cool to see another way to get money in play and still be able to play Tactician.