Cash and TV ads alone don't win elections. Fisher just proved that by getting soundly trounced in the Columbia mayor's race by Coble. Because of his connections in the State Senate, Moore has a built-in advantage when in comes to troops on the ground over any Mayor, especially one from a mid-sized city such as Florence. For Willis to win the nomination, I think he'll need to differentiate himself from Moore in a way that appeals to the base better than Moore.
Cash and TV ads may not win elections by themselves, but Moore does not have the executive experience of Willis, however he does have significant influence in Columbia. It should be a close race.