I don't see CD as particularly charismatic, or intelligent. Narcissistic, yes. It seems like he couldn't really work a "job". Mostly jobs that were low skilled, with slim to no interaction with other employees or supervisors. Tammie Daybell worked for the City of Springville, where CD got his job working at the cemetery. CD was writing books, that appealed to a specific audience, and his writing was so "out there" that he lost Deseret Book, an LDS publisher. That is when he started his own "vanity press", with Tammy doing all of the work.
When CD wanted to move to Idaho, Tammy managed to get a job working in the school district, it seems like CD was doing sales, again, a job that doesn't require getting along with co-workers, or supervisors.
I will throw this out there, pure speculation, I wonder if Tammy's family was not impressed with CD, and CD wanted to get some "space" from that situation.
LVD probably thought CD was a businessman, with more resources. I will hazard a guess that CD's finances were pretty unhealthy, spending money to impress LVD. In a spiral, and Tammie's death benefits were going to fix that.
Lots of speculation here, based on reading several articles about CD. No references. But it is easy to see a picture of CD from the articles.