Build Counter Strike Global Offensive website

I am looking for someone to build a website/program built similar to: [login to view URL] where players can deposit guns from the steam game CSGO into a big pot and receive a % chance of winning based on the value of the weapons submitted and randomly select a winner to receive the whole pot of weapons as well as have the system take a small commission based on the total worth of the pot. I was told this can be made possible with wordpress through wp core modification If you can please let me know if you can do this for me and how much it would cost me thanks! We have graphic designer and layout of website.