Create Images/Assets for a Virtual Coaching Marriage App for iPhone (and possibly Android)

I have created a marriage program called The Doghouse, which includes a marriage guide and app. I have already found someone to actually build the app and layout each page of the app. However, there are various images/assets that I need for the app and the person building and laying out the app is not a graphic designer/artist. So I need someone to create these various assets/images for me. The images/assets could be from already existing images or be created from scratch. I am open to either one. I am looking for images that are comic like but not juvenile. Here are the images/assets that I need: 3 different dogs (in various positions) a bone a water/food bowl a ball (the kind a god chews on) a backyard background for the home page a doghouse for the home page a doghouse with one of the dog characters inside I have attached the page layouts, so you can get a better idea of the layout of the app. Here is a brief description of the app: I have created a marriage program called The Doghouse, which includes a marriage guide and app, and the power of the support from an entire community of men working on improving their marriage and themselves. The program begins with reading or listening to the marriage guide and performing the assignments throughout the manual. In order to coach the user through the guide, the app will remind the user to complete the assigned reading and tasks in a humorous manner. Once the user completes the guide, his daily goal will be to refrain from criticizing his wife and to perform the 3 T.A.P. tasks (TAP stands for Time, Appreciation and Passion). The app is designed to assist the user in completing these tasks by: Daily reminders to the user to complete the tasks Tracking the user’s task completion success rate Allowing users to share suggestions and ideas that have helped them complete the tasks The app is also designed to give the user encouragement through the daily reminders, messages upon completion of the daily tasks and regular blog posts. The app even reminds the user of his wife’s birthday and their anniversary and provides gift suggestions as submitted by the users.