Your “research” is woefully lacking.
Read Shelby Foote’s three volume history of the Civil War for some truth. It is exhaustible fact and detail. It is gigantic (3000) pages but lays the War and the reasons for it.
A second good source is Allan Nevins 7 volume history of the Civil War. Foote’s work (which I find excellent) does have a slight Southern bias. Understandable, he was from the South. Nevins’ work is as good as Foote, but with a slight Northern bias.He was from Illinois.
Does it mention 200 million dollars per year in lost income for New York/Washington? (you know, the same deep state/crony capitalists who run Washington power today?)