Instead of being time-based, having them based on your subscription tier. You don't need to be in the particular instance to have access to the title (ie: someone in Prime could use Expropriator if they have TF access).

Title	F2P	Basic	Premium	Platinum	Fallen
Freeloader	X	X	X	X	X
Supporter		X	X	X	X
Benefactor			X	X
Expropriator				X	X
Altruist				X

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Uzmam! The Chairman will NOT be pleased to know you're trying to build outside of approved zones. I'd hate for you to be charged the taxes needed to have this place re-zoned. Head for the manor if you're feeling creative.