Good thing your not an economist; everything achieved was with the GD credit that dragged Germany and many of their European trading partners out of the Great Depression, which made them pretty solid trading partners through out the war.
Sorry, I don't think the actual trade relations of Germany during the war are any indication of how good trade partners they were.
Distant countries could not trade with Germany - the Allied blockade saw to that.
Close, European countries could trade with germany - in the full awareness that there were Panzerdivisionen right over the broder, if not already present on their territory. So yes, they accepted what little carrot the Germans could offer; it doesn't mean they would have, if Germany had not had the big stick in the other hand.
Note, for instance, how the Swedish trade shifts apace with the war's fortunes.
The growing debt was recycled and controlled through out the war, since Hitler controlled the Reichsbank and passed this debt on to the occupied territories.
That's true, and the other poster is also right that the internal debt was not paid back. State bonds' maturations were arbitrarily postponed, leaving German investors and savers waiting.