The board of county commissioners of any such county owning a county infirmary or county home, or any part thereof, is hereby authorized to sell the same or any part thereof after the election in the manner as provided in Kan. Stat. Ann. §§ 19-2113 and 19-2114; and may use the funds derived therefrom to purchase land and to erect a suitable building or buildings thereon and to make other necessary improvements, and provide necessary equipment for the establishment of a home for the aged: Provided, The said board may use funds from the sale of county property or any part thereof to improve, build additions or additional buildings to their main portion of the original poor farm or county infirmary, and any funds not used as provided by this section or Kan. Stat. Ann. § 19-2115 shall be placed in the county general fund.