Germany does not have a residency category which allows immigration to to care for an individual who is not related to you, and is not a minor. Proof of income is not specific to a category but a general requirement when applying for a residence permit, that you have sufficient income and/or financial resources
The German Federal Office for Migration and Refugees outlines the purposes for which a resident permit may be obtained.
The residence permit is issued for a limited period of time. It is granted to persons who:
- would like to undergo training in Germany (sections 16-17 of the Residence Act [Aufenthaltsgesetz]),
- would like to work in Germany (sections 18-21 of the Residence Act),
- are entitled to remain in Germany for humanitarian or political reasons or under international law (sections 22-26 of the Residence Act),
- are immigrating to Germany for family reasons (sections 27-36 of the Residence Act),
- are foreign nationals and former Germans who would like to return to Germany (sections 37 and 38 of the Residence Act), or
- hold a permanent right of residence in another Member State of the European Union (section 38a of the Residence Act).
The sections under which caretaker, or caregiver, would be applicable are:
- Family Reunification (Sections 28 and 29 – spouse, parent or underage child) – For family members who want to enter Germany in order to join family already living in Germany.
- Settlement Permit (Section 9) – This is the permanent residence permit, usually granted only after 5 years residence in Germany, and which requires a certain level of language proficiency.
The Residence Act, as it describes settlement for the purpose of care (or care and custody, or personal care), is referring to minor children and/or their parents. It is not a visa category or employment under which one can emigrate to Germany, for either short- or long-term residency.