Germany still got the resources of Hungary, Romania, and Bulgaria in WWII even though it did not conquer any occupy them. Having Czechoslovakia and Poland without western intervention means the Balkans are in Germany's sphere of influence, and they are going to cooperate. Likewise, much of Scandinavia can be expected to cooperate with Germany to make sure they avoid provoking Hitler.
Losing the ability to pillage Western Europe of its wealth will cost the Germans something, but they also don't have any of the costs of occupation, the losses from fighting and defending it from Allied raids, and they can continue to purchase raw materials without a British blockade. Parts of the western European economy can still be utilized by Germany in terms of normal trade.
Germany might still be at a slight loss compared to what it could command IOTL, but probably not enough to make up for the huge gains it receives in not fighting a two front war.
Germany is unlikely to achieve the victory Hitler wants. The Soviet Union is not going to collapse. But he could very well achieve a negotiated peace that gives him substantial gains - the Baltics, Belarus, and Ukraine including the Donets basin. Depending on the details of how the scenario played out, those could be less or more. I can imagine several scenarios where Germany essentially gets nothing, to ones where they get the Kuban and more as being equally plausible. War is uncertain and there are lots of unanswered questions that people will have different answers for.