Sully County

Sully County's investment profile is defined less by what the numbers show and more by what they cannot show. With a median home price of $259,224 and a cash flow score of 0, the dataset does not contain sufficient rent data to produce a cap rate, cash-on-cash return, or monthly cash flow estimate. That absence is itself a signal. In a county of 1,318 people, the rental market is thin enough that reliable comparable rents are difficult to aggregate, which means underwriting here requires boots-on-the-ground rent surveys rather than reliance on any automated estimate. The appreciation picture offers limited encouragement: home prices are down 4.28% year over year, the appreciation score sits at 29 out of 100, and the county ranks 634th out of 1,000 nationally, placing it in the 19th percentile. Among South Dakota's 50 counties, Sully ranks 41st overall. The affordability index of 72 and median household income of $66,875 suggest that homes are not wildly out of reach for local buyers, but affordability relative to income matters little if rental demand is structurally absent.

The investor profile that belongs in Sully County is a narrow one. Cash flow buyers cannot underwrite what they cannot measure, and the zero scores across cap rate and cash-on-cash return reflect that data gap, not necessarily a zero-return reality. An appreciation buyer has little to hang a thesis on given the 4.28% price decline and a 29 appreciation score. The closest candidate would be a highly localized operator, perhaps someone already farming or ranching in the area, who has direct knowledge of the tenant pool, can self-manage, and is acquiring at a price point ($259,224) where a single stable long-term tenant could produce acceptable returns even at modest rents. For anyone outside that narrow profile, the risk-reward calculus is difficult to defend on the data provided.

No economic anchors or employer data were provided for Sully County, so it would be irresponsible to speculate about the demand drivers behind whatever rental activity exists. What the population figure of 1,318 makes clear is that Sully is among the smallest counties in the country by headcount. At that scale, a single large employer opening or closing, a single school consolidation, or a single year of poor agricultural conditions can shift the local rental market materially. Demand here is not diversified across industries or workforce segments; it is concentrated in whatever narrow base supports a population of roughly 1,300 people.

On carry costs, the combined monthly tax and insurance burden comes to $354, based on South Dakota's state-average effective property tax rate of 1.28% and an insurance rate of 0.36%. The tax Foundation 2024 estimate is the source, and as the data notes, actual county and township rates may differ from the state average. The 1.28% rate falls in the normal range and does not flag as a particular headwind or tailwind. At a $259,224 purchase price, annual property tax runs approximately $3,318 and annual insurance approximately $933. These are manageable figures, but they need to land against a rent number that, as noted, is not available in this dataset. Any investor seriously underwriting this market needs a verified rent figure before $354 per month in tax and insurance can be contextualized within a broader operating budget.

The concentration risk here is structural, not cyclical. A county of 1,318 people has an illiquid resale market, limited comparable sales activity, and a rental pool that could be measured in dozens of units rather than thousands. Regulatory risk is likely low given South Dakota's generally landlord-friendly legal environment, but demographic risk is real: a population this small, in a rural Great Plains county with declining home prices, faces headwinds from long-running rural depopulation trends across the region. None of that is invented; it is the logical consequence of the numbers in front of you.

Compared to its neighbors, Sully sits in the middle of a uniformly modest peer group. Roberts County carries a lower median price at $214,859 and a slightly higher overall score of 50, making it a more accessible entry point with marginally better aggregate metrics. Campbell County is cheaper still at $190,297 but scores only 46. Codington County, the only neighbor with rent data provided, shows a rent-to-price ratio of 0.00358, a figure that translates to roughly $1,000 monthly rent on a $335,019 median price, which is a thin yield but at least a measurable one. For an investor choosing among these options, Codington's rent data availability alone makes underwriting more tractable, even if the price point is higher. Stanley County at $296,866 and an overall score of 49 offers little differentiation. The case for choosing Sully over any of these neighbors would have to rest on a specific off-market opportunity priced well below the $259,224 median, a confirmed tenant in place, or a personal operational advantage that no outside investor can replicate from a spreadsheet.