By the late 1870s, Bullock and Star purchased a ranch where Redwater Creek met the Belle Fourche River and started the S&B Ranch Company. Bullock raised horses for harness racing and was credited with introducing alfalfa to the territory in 1881.
Bullock somehow acquired some 2,000 acres and seemed bent on getting even more and building a community. Alas, he was upstaged by entrepreneurs who created the town of Minnesela at a site just south of present day Belle Fourche. With creation of the new Butte County, they even won an election to be the county seat. Bullock lured the Fremont, Elkhorn, and Missouri Valley Railroad to build farther north, which they did in 1890 some three miles northwest of Minnesela. Bullock was credited with essentially founding the town of Belle Fourche.
He then offered Minnesela businesses free lots in Belle Fourche, and the county seat was subsequently moved there. Belle became the largest railhead for livestock in the United States.
Bullock had evened the score with Minnesela.