S.D. Codified Laws § 9-38-31
Upon recommendation of the board the governing body may provide by ordinance for the purchase, condemnation, or otherwise obtaining of land within or without the city limits for public parks, parkways, and boulevards, and establish the same.
Payment for any such land so selected and acquired may be made by cash, by purchase by installment payments with or without a mortgage, by entering into lease-purchase agreements, or by lease with option to purchase, out of the general fund, park fund, or by the issue and sale of bonds of the first or second class municipality after authorization as and in the manner provided by this title. No mortgage given hereunder shall provide as security property other than the specific land acquired pursuant to the provisions hereof.
SDCL 9-38-31