=== Coin Locks ===
How about [[lock]]s which instead of requiring [[key]]s, take [[Item:Coin|coin]]s to unlock? In a similar way that you can rent [[bed]]s you could allow access to [[house]]s for a price. Getting back out of the [[house]] should be free of course.
You could have a [[house]] (with high QL [[oven]] and [[forge]] etc) with one [[door]], which you would have to pay to get in, and another [[door]] (free to use) which leads to a closed off [[field]] and [[iron]] [[mine]].
People would pay to have access to the facilities until they leave through the main [[door]]. Just a random thought.
=== Summary ===