Templars and Hospitallers as urban landlords

"Although the strictly managerial documentation of the local commanderies sheds little light on this aspect, the economy of the military orders were essentially geared towards the needs of the Holy Land. The military orders therefore developed a profit-oriented economy based on the direct exploitation of agricultural and livestock resources, on land rents and on control of certain exchange and production activities." However, they also held urban properties. Some facts on the military Orders as urban landlords.

The real estate agents of the Knights Templar

When they established themselves in certain Provençal towns, the military orders sought to rely on some urban knights by entrusting them with the task of making acquisitions for the benefit of the commanderies in formation. A practise which continued later. What did these "real estate agents" do?