What are the visa & residency requirements in Altea?

"In order to visit Altea, visitors must obtain a Schengen visa from the Spanish Embassy or Consulate in their home country. The application process for a Schengen visa includes submitting a valid passport, a completed application form, two passport-sized photographs, proof of travel insurance, and proof of sufficient funds. In order to obtain residency in Altea, Spain, applicants must first obtain a residence permit from the Spanish government. The application process for a residence permit includes submitting a valid passport, a completed application form, two passport-sized photographs, proof of sufficient funds, proof of health insurance, and a criminal background check. Additionally, applicants must provide proof of employment or proof of sufficient income to support themselves. Once the application is approved, applicants must register with the local police station and obtain a Foreigner's Identification Number (NIE)," said another expat in Altea, Spain.