WOAH big money dolla.... You think people are going to spend $500 each?
If this is true then there is NO recession.
Where did you get that from and through what means?
This isn't even counting the immense amounts of money that people who are already in the city are spending on crap like souvenirs etc etc. Obama's inauguration is already being seen as the Superbowl of inaugurations. Bigger, larger and with more people. Advertisers will want to put their names on every part of the city. This also in my opinion would bring a substantial amount of money to the city. The considerations taken in an inauguration aren't small. Pretty much every little dime gives back a dollar.
I guess we will see..... But Historically this has cost DC, not surplussed it.