Signature campaign maybe work for you, or you can do some gigs for other people etc...
But just like the title says, how about if you are really desperate for money. I guess signature campaign is not the right way for having money desperately. But having gigs for other people is some how helpful but you must be specific on what kind of gig is you are talking about.
Signature campaign would help but not much, you need to find a good amount of money to spend on whatever makes you desperate of money, I think if you are a risk taker gambling would be the easiest and simple way, if you are lucky then your problem is solve.