Can be easily done. I have been working on Steam bot past these days.
The site will be like CSGOLucky as u wish. I have a live example if u want.
The Steam bot will has the escrow fix also (i.e it can work with Mobile Authenticator)
Everything will be automatic. You will have a backend admin panel to setup Min. bet value change, change sitename, add giveaways, Ban users. Ban users from chat, etc.