Graphics for a mafia-based game for iPhone / iPad

I'm working on making a game similar to mafia wars on facebook and on iPhone etc. I need all graphics done for the game so the project requires quite some images. If you have an iPhone or iPad, check out Original Gangstaz for reference. Following are some images I can think of that will be required but it's not an exhaustive list. If you look at one of the games you'll get a better idea of the work involved. * iPhone / iPad app logo * Image for "Bank" * Image for "Fight" * Image for "Items" * Image for "Properties" * Image for "Travel" * Image for "Crimes" * Image for "Doctor" * About 10 different images for types of properties. A bank, a liquor store, a laundromat, etc. * About 5 images, one each saying the name of a country. * about 25 images saying the name of separate cities. * A button for "Forum" * A button for "Messaging" * A button for "Profile" * Background image * Images for about 20 different weapons, 20 different vehicles, 20 different gear items. Please estimate how much it will cost for this project and how long it would take you to complete the project. Please also show some examples of your previous work. Thanks, Toxicool