Genealogical Research for Greek Family History

I need help piecing together my grandfather’s journey from Turkiye to Greece in the 1920s. The priority is immigration records held in Mainland Greece— passenger lists, arrival manifests, residence permits, or any other official paperwork that can confirm whether he travelled with siblings... (Budget: $15 - $25 AUD, Jobs: Data Collection, Data Entry, English (US) Translator, Genealogy, Immigration, Legal, Research, Translation)