Create a fun app

I need a game created that will entertain people. The game will be free, it will be based around making money. You will have options and at the strt of each day through the game you can go exploring to garage sales and such and buy items or you can go to your warehouse and browse your items. Another option is a virtual ebay where you list your items. This game will help kids learn to barter and be very fun to play. I do not want this game to cost money or else kids will not get it. I want it to be fun enough that people ask why this does not cost money! I know you are thinking this guy is a chump he knows he is going to loose money paying me and paying apple to keep the app on the market, Sorry to dissapoint you all but I do not want to be a chump. Please set your price at 40$ if you read this all. I want to sell shirts based around the logo of the game. I want the game to have a cool logo. I like the Fall out (video game) boy logo and want to buy a shirt like it. This game will be an app. Any questions and I will gladly respond. If you do not want to work cheap then get outta here!