“2. The ship building ports and industry were in New England “
You seem to be pretty up on the fact that the South was not industrialized. You post it constantly. Facts are difficult pesky little things. :-)
Show me some evidence that the South had any resources or skilled artisans to build ships. :-)
Show me some evidence that any significant exports were being shipped out of Charleston or Savannah. :-)
Show me the money. :-)
Rinky dink towns. New Orleans was the second busiest port in the US in the 1850s. By some estimates, it also had the largest cotton and slave markets in the country (Charleston and Washington DC also claimed the largest slave market -- the second busiest cotton port was Mobile, Alabama).
In 1840, New Orleans was the third largest city in the country after New York and Baltimore. The population more than doubled from 1830 to 1840. In 1850, it was the fifth largest (Philadelphia and Boston having crept in ahead of NOLA).
So I don't know what Charleston or Savannah were up to, but New Orleans was doing pretty well before the Civil War, and no Yankee tariff or shipping conspiracies kept it down.
They started building them during the war, why not 33 years earlier, could've saved 600,000 lives according to your theory.