Why bother. Whoever is appointed will either turn out to be a swamp creature or be intimidated by the swamp (See Rosenstein, Barr, Sessions).
Anyway, save all the money because I can already tell you what the conclusion will be: “There may have been some voter fraud on both sides but not enough to affect the election. There is insufficient evidence to convict any specific person.”
Our government is essentially corrupt. Trump revealed the level of corruption but could not do anything about it because the corruption is pervasive. We should call it “systemic corruption.”
Yep, military is the only option. The rest is a dog-and-pony show.