Read this: The Hellenistic states of Asia and Egypt were run by an occupying imperial elite of Greco-Macedonian administrators and governors propped up by a standing army of mercenaries and a small core of Greco-Macedonian settlers. Promotion of immigration from Greece was important in the establishment of this system. Hellenistic monarchs ran their kingdoms as royal estates and most of the heavy tax revenues went into the military and paramilitary forces which preserved their rule from any kind of revolution. Macedonian and Hellenistic monarchs were expected to lead their armies on the field, along with a group of privileged aristocratic companions or friends (hetairoi, philoi) which dined and drank with the king and acted as his advisory council. Another role that was expected the monarch fill was that of charitable patron of his people, this public philanthropy could mean building projects and handing out gifts but also promotion of Greek culture and religion.

What type of estates did Hellenistic monarchs run their kingdoms?
What is the answer? (If it cannot be answered, return "unanswerable")
royal estates