I do not think this could work and here's why:
With bigger prize pool obviously there will be many more players wanting to compete, and logically the room should be bigger to support more players and make the prize harder to get that in normal tourney. However this is impossible because Toribash servers can barely handle 25-30 players, let alone tourney mode of that scale.
If we really want this to work, something has to be done about Toribash servers first, and I doubt its possibility at the moment.