Why did Nathan Bedford Forrest's business career struggle after the Civil War?

Nathan Bedford Forrest’s business career struggled after the Civil War primarily because he had exhausted his personal fortune during the conflict. Furthermore, the abolition of slavery eliminated what had been one of his most significant and lucrative antebellum business ventures. While he later served as president of the Selma, Marion and Memphis Railroad and managed a plantation utilizing convict labor, these endeavors did not reach the level of financial success he had achieved prior to the war.12