According to the US Census,
Sumter County, FL, median household income, 2008: $48,106
Sumter County, FL, per capita money income, 1999: $16,830
Lake County, FL, median household income, 2008: $45,517
Lake County, FL, per capita money income, 1999: $20,199
Marion County, FL, median household income, 2008: $40,266
Marion County, FL, per capita money income, 1999: $17,848
http://quickfacts.census.gov/qfd/states/12/12119.html