In what most consider the final episode of the series, the town's often-antagonist banker, Preston A. Lodge III, went bankrupt as a result of the great stock market crash caused by the Panic of 1873, a historically-accurate event. Lodge lost much of the townspeople's money along with his own in the Panic.
One of the major historical oversights of the show is that Colorado Springs was not technically founded until 1871 by General William Palmer and was mainly a resort town. There were no saloons as Palmer declared Colorado Springs to be alcohol-free. Colorado Springs stayed "dry" until the end of Prohibition in 1933.
For more on the subject, see TV Shows Featuring Indians.