Tolkien’s approach to writing a story is quite unique. He created the world in which his stories took place in first, which meant that the plot of each story was another chapter in the history of his world. Some may take this as a “make it up as you go along”, but Tolkien allowed a lot of the story to write itself thanks to his in depth world.

Financing war with poetic Faery money is not a premise I have ever heard before and I hope that you are successful with the final product.