Key facts: Federal Garn-St. Germain Act prevents mortgage acceleration on death transfers; South Dakota's $50,000 small estate threshold governs simplified probate eligibility; a mandatory 30-day waiting period applies before estate distribution under SDCL 29A-3-801; heirs have nine months to disclaim inherited property under SDCL 29A-2-801; inherited property receives a step-up in tax basis to fair market value at death.