I think it was financed by the french and Spanish after Saratoga and before it was financed by everyone bringing there own gun and food was stolen.
It was financed by Rosicrucians out of Britain, Germany, & Austria (Rothschild's were high-level Rosicrucian bankers), although it was formally told in the history books that France and Spain financed the war (and some Americans).
It is not known for certain who bankrolled the American Revolution. However I do believe that the facts would point to Bdrummen's comment. It seems likely that since the Rothschild's received their First Bank of the United States through Alexander Hamilton in Washington's Administration that it was in return for financial assistance throughout the war. Also, it is very interesting that Thomas Jefferson went to Washington about this and was assured by President Washington that such an intrusion could never take place under his careful watch. Yet the Rothschild's received their twenty year charter. And as we know, the non renewal of that charter in 1811 caused the war of 1812.
It was secretly financed by the Rothschild's (although formally funneled through French and Spanish bank accounts) and paid to John Adams. You might ask why a German/United Kingdom/Austria royal family would do this, but it actually benefited their family (& other high tier bankers) to finance such a war because it would reap profits on trade routes and gun sales, and also philosophically made sense to the Rothschild's and bankers to divide and conquer as they have always done.