It doesn’t matter what buying power was. You can calculate a lot of her bills and she has no disposable income from an 18-20k a year job. Suzie has a job but she had her own set of expenditures and cosmetology school enrollment to consider.
To contrast, Stacy, who also had a job, had an older car—her family with nearly 3x the income of Sherrill.
You’re brushing this aside way too easily. 18k over 12 months is a very small amount. Sherrill paid often with money orders. That’s not something someone with a comfortable income does.
If the motive is silence—meaning dead people can’t talk, then you definitely have to follow the money. The cops thought the same thing. Worsham’s statement hardly rules anything out. Also Mike, the same cops did and said wrong things about you constantly—Worsham’s statement carries that much weight with you?