>>27998
That's a good way to look at it: with no buyers German industry had to produce "money sinks". Where have you read it? If it's nowhere on the literature then you have a novel insight.
But the "money sinks" didn't have to be military, they could have been civilian. Autobahnen themselves were a production of this kind. A huge investment in subsidized or free housing could have been made. Tooze repeatedly argues Hitler made decisions and had several options available.

>inner markets can suck up only so much
There was leeway for expanding inner markets. German consumers didn't have that much purchasing power because Germany itself wasn't a very wealthy country (this is a big point in the book), but a large portion of their income went to savings and taxation and could thus be funneled towards consumption. Some things were in very high demand, such as housing, which faced an acute shortage.
>the relatively strong Reichsmark also was in the way of meaningful export
A "remarkable" workaround was found, and another one (devaluation) was available.