I have read your posts and you are quite unfamiliar with the monetary aspect of the Civil War.
The trade on the Mississippi was issue #1.
Our position is thoroughly identified with the institution of slavery - the greatest material interest of the world. Its labor supplies the product, which constitutes by far the largest and most important portions of commerce of the earth. These products are peculiar to the climate verging on the tropical regions, and by an imperious law of nature, none but the black race can bear exposure to the tropical sun. These products have become necessities of the world, and a blow at slavery is a blow at commerce and civilization. That blow has been long aimed at the institution, and was at the point of reaching its consummation. There was no choice left us but submission to the mandates of abolition, or a dissolution of the Union, whose principles had been subverted to work out our ruin.
Trade on the Mississippi was so important that the state legislature of Mississippi failed to mention it.
I'm not as unfamiliar as you might suppose, but the purpose of this thread is to review and refute some of the most commonly seen Neo-Confederate myths.
So I'd say that "trade on the Mississippi was issue #1" was a great Neo-Confederate myth, and I might consider it for my list except for two things:
Of course, if you can produce some evidence, then we might have something to work with, but your idea seems so far fetched, I'd wonder why you even bother?