G20 Costs V

Just when you thought it couldn't get any worse:
Sources tell me [the] security cost of the disastrous G-20 summit will reach at least $2-billion. (link)
That puts the final cost of the G20 summit at about 150 times the cost of the two other summits last year in the US and the UK.

For the same price of one summit in Toronto, the UK could have had 150 summits.

At what point does something become a debacle?

G20 Costs IV
G20 Costs III
G20 Costs II
G20 Costs I