I'm brand new to Freelancer and your post is the second posting I've seen. Not weird except that I'm at Lawrence and Paulina - I literally walked past Rosehill about six hours ago.
There are a few ways to do some short term fundraising - events and grants come to mind but the time deadline for this is really, really soon and I wouldn't promise anything without more information. . I'd love to get some details about your organization (name, non profit status (are you a 501c3?), previous events/efforts).
For a coffee* and scone, I can brainstorm (I think you can message me on Freelancer). For $250 I can coordinate an event and for $600 I can put a grant together but I wouldn't want to accept the gig if I didn't think I could get results.
* I would submit a list of acceptable Ravenswood/Andersonville coffee shops.