Sioux Falls is booming after a decade of investment by the financial and medical industries.
Sanford Health is particularly noticeable - there are multiple hospitals and research centers there or under construction.
I believe the banking is mostly credit card companies and cheque printing.
It's got a surprising number of amenities for a small city and if you can stand the location and politics it's got relatively high wages and low cost of living.
I figured that was the case, but Sioux Falls also does a lot of advertising in the Twin Cities (Minneapolis / St. Paul MN) to convince businesses to move.
Sioux Falls is actually a pretty nice town. SD is a bit strange because the capital of the state is such a small town. SD also has no state income taxes for individuals or businesses.