What are the visa & residency requirements in Montana?

"Foreigners wishing to stay in Montana must first obtain a valid U.S. visa. The process of applying for a visa is a three-step process. First, applicants must provide necessary documents, including a completed visa application, a valid passport, two recent photographs and proof of financial support. Second, applicants must schedule an appointment at a U.S. Embassy or Consulate for an interview and biometrics collection. Finally, applicants must pay the visa application fee. Once a person has obtained a valid U.S. visa, they may then apply for residency. To apply for residency, an applicant must first submit a complete and accurate application packet to U.S. Citizenship and Immigration Services (USCIS). The application packet must include all required forms, supporting documents, and the filing fee. Once the application is received, an office visit or an interview will be scheduled to determine the applicant's eligibility to become a resident. Once approved, applicants will receive a permanent resident card (green card)," mentioned another expat when asked about moving to Montana.