Key facts: South Dakota's mandatory probate waiting period is 30 days; estates valued at $50,000 or less may qualify for simplified small estate procedures; all co-inheritors must consent or court approval must be obtained for valid buyout transactions; professional property appraisal is required to establish fair market value for buyout calculations; buyout agreements must be formally documented and typically require court approval in probate proceedings; partition actions may be filed when co-inheritors cannot agree on voluntary buyout terms.