I wonder if this makes it more difficult for the live-in caretaker to eventually find another place (if that's what they wanted) because they're effectively ear

I wonder if this makes it more difficult for the live-in caretaker to eventually find another place (if that's what they wanted) because they're effectively earning less? I.e. I wonder if the rent is usually R dollars if their salary (S2) is actually S2 = S1 - R where S1 is what they would be paid if they weren't receiving the housing, or if it something more like S2 = S1 - R*T where the amount deducted from their salary is more than the actual rent cost. Not quite the same, but I've done many "work trade" situations where I've lived on a property with some kind of house/structure and other furnishings/utilities provided in exchange for doing farm work or other labor. It never worked out economically well because the amount of time I had to put into where I lived made it difficult to also work elsewhere for money.