Olympics in Sydney was a money pit. An expensive legacy. I'm not sure if the events followed since then had allowed recovery.

http://theconversation.com/hosting-the-olympics-cash-cow-or-...

http://economicstudents.com/2016/09/road-ruin-economic-case-...

There are actually a lot of academic studies now into the Sydney 2000 Olympics economics. Quite interesting.