A special fund, to be known as the veterans’ home operating fund, must be maintained in the state treasury. Moneys arising from the interest received on money derived from the sale of lands appropriated for the support of the home and from the rental of these lands, moneys received from the United States for the support and maintenance of the home, and all other moneys, income, and collections of public funds arising from any other source or endeavor of the home, except as provided for in section 37-15-21, must be placed in the veterans’ home operating fund for the use and maintenance of the veterans’ home.