How felt morally obligated to put his wealth to good use—going so far as to state of his fortune, "I have not earned it, it is not mine"—and he chose the homeless as the population he would dedicate his money and his life to organizing and advocating. He saw hobos as a class of people that was crucial to American industry but marginalized from society. Therefore, How spent most of his family estate and the tolls for Eads Bridge on his work with the homeless. How's vision came from the social ideas of Christian socialism and Social Gospel. In addition to advocating for hobos, How chose to live as one, even though he had both money and education. He wore a shaggy beard and rough tramplike clothes. It was said that even ordinary hobos looked well dressed compared to How. From about age 25, he traveled around doing hard work for a living. One of How's contemporaries, sociologist Nels Anderson, describes how fully How immersed himself in the hobo lifestyle and how seriously How took his work:
Central to How's work was his brainchild, the International Brotherhood Welfare Association, a sort of union for the hobos with headquarters in Cincinnati. Through the IBWA, How sponsored various hobo advocacy activities, including "hobo colleges", hobo journalism, and conventions. The media often ridiculed How and his many failed projects, calling him the "Millionaire Hobo" or "Millionaire Tramp", but it did not seem to discourage him. The hobo colleges, which How started in several cities, primarily offered lodging and meals, but as the name implies also education and a place to meet. The education would be scheduled certain nights and included basic lessons in social science, industrial law, public speaking, job searching, and anything else that might be understood and useful for the hobos. The lectures were held by street orators as well as academics. How often talked about social politics subjects such as 8-hour working day, pensions, and unemployment. The ensuing discussions were known to be very lively. They also served as community meeting places where the homeless workers could express themselves. Hobo College was held mainly in winter when there were fewer jobs and more hobos in the cities. The success of the "colleges" varied. The Chicago branch was the biggest and one year debated with University of Chicago students. A hobo college was usually a rented building in the hobo area of a city. There would be blankets for sleeping, a washroom, and a kitchen, where the hobos cooked their favorite mulligan stew. The houses often failed, and How had to spend much time going around and restarting them. The other main work of How and the IBWA was the Hobo News, a magazine for hobos. Hobo News was published from about 1915 to at least 1929, and is now considered a predecessor to the modern street paper movement. According to contemporary sociologist Nels Anderson, How had almost complete control over the IBWA and Hobo News, at least in the beginning. This was not because he sought power—he had strong democratic ideals and gave individual "colleges" and other projects much management sovereignty—but rather because of his money, which was often needed for new ideas or to cover for financial problems. How often paid for meals at the hobo conventions and other meetings. Less optimistic critics said that without the doughnuts and other free food, the hobos would show little interest in How's organizations. However, How never gave cash to those who tried to ask him for it. After the start of World War I, the Espionage Act of 1917, and government attacks on the larger Industrial Workers of the World, the less radical IBWA and the Hobo News'' also came under scrutiny. The IBWA often pointed out that it was distinct from the IWW, though somewhat supportive of the other organization. As IWW was increasingly broken many of its members joined IBWA, leading to both radicalization and faction conflicts. How was on the moderate side and preferred the IBWA to focus on education and more immediate political issues like abolishing vagrancy laws, rather than direct action and sabotage.
Other
How became mentor of Ben Reitman, who said the first time he went to an IBWA meeting and met How changed his whole life. Reitman went on to found the Chicago hobo college, one of the most successful, in 1908. How was chairman of the National Committee for the Relief of the Unemployed in New York but went back to St. Louis in 1908, after disagreeing with other leaders. In 1914, How led a group from the IBWA in New York to join the second Coxey's Army protest march to Washington, D.C.
Later life
At 50, How married and moved to Los Angeles in the 1920s with his wife Ingeborg. They had a house built by the famous architect Rudolf M. Schindler in the suburb Silver Lake, in 1925-26. It was designated a Los Angeles Historic-Cultural Monument in 2007. How did not stop his social work, however. The couple divorced two years before How's death.