And, Marshall acknowledged, spending his own money for a trip to South Ben, Ind., shows how serious he is about the Irish.
"I'm coming with an open mind to it," Marshall said. "I want to see how the school is, and how the coaches are, but aside from that I don't really know. I'm going into it open to see what kind of things they have to offer, and to see what is there."
While on campus, Scout.com's No. 20-rated running back will keep a close eye on how the staff interacts with the players, and how the running backs are used.
"It's important," he said. "I want to see how they practice, the flow of it, the rhythm of it, and how in sync they are and things like that. I want to see the running backs, and how (running backs) coach (Tim) Hinton coaches them."
The trip to the Midwest isn't the only travel Marshall will be doing later this month.
And while many players are making decisions before their senior season begins, or stating they will hold off until making official visits after the season, Marshall, isn't putting a timetable on selecting a school.
"I feel like I'm going to make a decision when I know," he said. "It's not like I'm going to wait to until after the season or a certain time. It's when I figure it out."