What are the visa & residency requirements in Santo Domingo?

"In order to visit Santo Domingo, visitors must obtain a visa prior to their arrival. The process of applying for a visa involves submitting an application form, a valid passport, a passport-sized photograph, and the applicable visa fee. Depending on the purpose of the visit, additional documents may be required. In order to obtain residency in Santo Domingo, Dominican Republic, applicants must submit an application form, a valid passport, a passport-sized photograph, and the applicable residency fee. Depending on the purpose of the residency, additional documents may be required. Additionally, applicants may be required to provide proof of financial stability, a criminal background check, and a medical certificate," mentioned another expat when asked about moving to Santo Domingo, the Dominican Republic.