This looks interesting.
Like TastyBacon, I don't wish to commit myself right now. I'd like to see how you are planning to develop the idea.
What sort of characters would you be interested in? For example, would it be possible to play one of the people in the armour with the guns? (Just curious - is there any reason why the people who own the brick houses wouldn't hire someone from the slums to guard their property? Other than the question of divided loyalty, of course...)
So, yeah, potentially interested, depends on who else signs up and what sort of characters you are after.
By the way, GREAT pics. I wish I could find artwork like that!