South Dakota is kinda similar to Nebraska in geography/land use. The eastern third(ish) is pretty intensive ag and the western 2/3(ish) transitions to range and ranch land. The far west by Rapid City and Spearfish is really cool with rolling and steep areas with lots of timber. Sporting opportunities are incredible with good fishing in East Central lakes and the central and upper Missouri river system. Then of course some of the best pheasant hunting on the planet, big whitetails, and muleys/antelope as you head west. There is excellent predator and varmint hunting as well with prairie dogs and coyotes common targets.
The state is reliably red as well, and once you get west of Sioux Falls the population starts to decrease dramatically. According to Google, taxes are pretty favorable: "South Dakota does not have an individual income tax. South Dakota also does not have a corporate income tax. South Dakota has a 4.50 percent state sales tax rate, a max local sales tax rate of 4.50 percent, and an average combined state and local sales tax rate of 6.40 percent."
I've not looked at land prices, but there may be opportunities for some savings in the western half compared to WY or MT.
Winter can be a real @itch in the Dakotas and those polar vortexes that drop down from the arctic can bring below zero and high winds. They reach down into Western Iowa where I'm at, but it can get much colder in the Dakotas.