What is different in Vampires: Bloodlust, though shared by many of the vampire-themed MMO text-based iPhone RPGs, is that they have renamed the property system. All of the MMO text-based iPhone RPGs use a property feature that allows you to invest your money.
You make money originally through missions and fights, then you take that money and buy property that then gives you money on a time cycle. This will become the main source of money for your character, which is should be the top priority of any of these games right from the start.
In Vampires: Bloodlust your currency is blood and you collect Minions. These are people from whom you extract blood. Here are some tips for working with the Vampires: Bloodlust Minions system.