Public funding of elections seem to work well in France. It's really not that complicated - an independent commission would be established to enforce those rules.
Yes, it is NOT that complicated IN FRANCE!! Are you saying, that if something works well in another country, that it will also work well in the States? Then why don't we have Universal Healthcare? Works well in many European countries(Russia, UK, Greece, Denmark, etc.).
Actually, I wish candidates did have only a 3 month election campaign period. That all forms of paid commercial advertisements through the press or by any other audiovisual means, would be prohibited during the three months preceding the election. But we don't. I wish that all political advertisements were also aired FREE of charge on an equal basis, for all the candidates on national television, print, and radio outlets, during the candidates campaign. But we don't. I wish media outlets would be held accountable for their actions in interfering in any candidates campaign. But they aren't.
Again, it is not about who dishes out the money, monitors compliance, or makes up the campaign rules. It is about the abuses to the system, that must be addressed(blacklisting candidates, smearing candidates with lies and innuendoes, media blackout of candidates, stereotyping candidates, demonizing and trivializing candidates, changing election rules to favor some candidates, etc.). These are the things that really threaten the free election process. No matter how equal the playing field is.
As I have said before, we already have an election commission(FEC), that monitors and enforces election and campaign rules. Elections should be free from any direct government intervention. And directly funding candidates can't be anymore direct.