First, that lack of financial resources wasn't an obstacle to the Bomb. Hitler had his government spend absurdly colossal sums on other and ultimately useless things mainly because of his stubborn fixations (real surprise, that) and even with the scientific brain drain due to Nazi persection of jews and dissidents of all stripes, enough sharp minds remained in Germany to pull it off I believe, but only if the whole concept had been taken seriously enough, early enough and with good planning and funding.

Secondly: Assuming they'd actually developed the bomb, delivery would have been a very solveable problem at that point for stopping a western Allied invasion dead in its tracks.

Stopping the vast soviet army would have been a different matter entirely, especially if they only developed the atom bomb later in the war. I'm not entirely sure about even a nuclear weapon being enough to put a brake on that level of thirst for revenge, combined with so much military force for applying said revenge.

> even with the scientific brain drain due to Nazi persection of jews and dissidents of all stripes

My point was precisely about that brain drain, in particular the dismissal of "Jewish Physics" (see https://en.wikipedia.org/wiki/Deutsche_Physik), which drove the atomic physicists right into America's open arms

So to watch the US destroy its seed corn with its own xenophobic brain drain is particularly ironic