what controls should be in place to monitor the hosting arrangement ?
Since you have listed this question in the Reference section, I am assuming you are not referring to the control in a scientific experiment. I think you are trying to determine the kinds of standard controls that may be used to evaluate a variety of situations for hosting travelers.
Standards that would be comparable among a variety of motels, bed and breakfast facilities, campgrounds, etc. could include cleanliness of common areas, availability of varied types of accommodations (size and number of beds, attached kitchenettes, suite arrangements), availability of additional services (pool, laundry facilities, pets allowed in room, child care services available, transportation to area entertainment features provided), ease of access (from major highways, airports, train stations), proximity to restaurants or shopping areas, and, of course, cost.