The board of directors of any cemetery district located in a county having a population of more than four thousand (4,000) and not more than five thousand (5,000) and an assessed tangible valuation of not more than eighteen million dollars ($18,000,000) may set aside all or any portion of the proceeds arising from the sale of lots in any cemetery of such district in a fund which shall be used only for the purpose of procuring additional lands to be used for cemetery purposes.