There is a 1900 Census for a Vesta McCoy in Bushville, Banks, Georgia, BUT it states she was born Oct 1891, which is not what her gravestone has for a birth date.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3FJ-1RG : accessed 30 December 2020), Vesta Mc Coy in household of Andrew Mccoy, Militia District 208, Bushville, Banks, Georgia, United States; citing enumeration district (ED) 2, sheet 7A, family 109, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,179.
There is a 1910 census for this same family.