I'm pretty sure that "the vast majority" of Villagers live in Sumter. It's the only one of the three counties where new construction of TV homes exists.
As suggested above, the Lake county portion is the oldest, and remains much closer to the original Villages, in which many homes are "manufactured" (that is, in less polite parlance, "mobile.").
There hasn't been new construction, so far as I know, in the Marion County portion of TV for many years.
My observation are:
Lake County is so geographically large that TV isn't all that significant a portion of it.
Marion County is also very big, and it's governmental structure reportedly has a much less friendly attitude toward TV.
Sumter County exists almost entirely because of TV. Many of the county's commissioners are Village residents. The much more rural and less populated southern portion of the county benefit considerably from the presence of TV, but do not necessarily automatically love us!
Having bought a newly constructed home, four-and-a-half years ago, I was essentailly forced into Sumter County. So, I cannot really address the tax situation vis-a-vis pre-owned homes in the other counties.
SWR