A land use district shall not be created under this chapter unless it is an area of contiguous territory encompassing twenty thousand acres or more of predominately rural and agricultural land owned by a single entity which has within its general boundaries at least seven platted villages which are not incorporated as municipalities at the time the district is organized. The eligible electors may create a land use district to conserve the distinctive historical and cultural character and peculiar suitability of the area for particular uses with a view to conserving the value of all existing and proposed structures and land and to preserve the quality of life of those citizens residing within the boundaries of the contiguous area by preserving its historical and cultural quality.