i already run some Jackpot websites. Im working with steam login, costumer can place there items, and than a random system is picking a winner, depends on there item value. There is also a Top list and a chat system. You can do a rake from 3-15% thats what your bot can send you via steam.
i already fixed the escrow problem (handy authentifikation)
you need a good SQL, FTP and a windows Server to run perfektly
+ a steam account and a handy for the Steam Bot
+ 7 days wait time for the steam bot trade bann from steam