I live in MN and know MANY people, including two on the Forbes 500 list who live in SD and fly to work in MN every day. They sleep over 185 days in SD each day and are legal SD residents. Sioux Falls airport has more than a few private jets coming and going every day for this reason. There is a nice airport in the Miller/Highmore area because the highest paid executive in the US worked in MN and had a ranch there that he called home. Saving 8% state income tax on $500 million a year paid for his private jet. MN has a very high income tax rate and treats capital gains as ordinary income. They also have a very high inheritance tax. I am a lifelong resident of MN and am seriously considering moving for these very reasons. But if I change residencies, I am really going to move, not just pretend.