So how much can Germany annex peacefully if they do it slowly enough?
Let's say Hitler has a close brush with death after Munich pact (car accident, close assassination attempt etc) which tampers his gambler's instincts and decides that he doesn't want to fight a general war anymore, or at least Germany needs 20-25 years of buildup before taking on the Judeo-Bolsheviks in Russia. But he still wants to annex as much territory in Europe as possible.
This would actually be a lot closer to what the generals thought OTL so I think it's fairly plausible.
Let's further assumes that he successfully tunes down the tempo of the arms buildup, there's recession but between allocating more resources to consumer goods production, bartering away some of the weapons from earlier buildups to countries like romania/hungary/bulgaria etc for foreign exchange, and buttressed by his popularity from annexing Austria/Sudetenland, hitler survives politically.
Can Germany given 10-20 years manage to annex Danzig? Rump Czechoslovakia? The Polish corridor? Anything further without provoking a war?