Hi! So I'm a snarky business coach helping startups and enterprises internationally.
First my snarky thought:
Many novice entrepreneurs and or aspiring crowd funders wait until the campaign is live to commit any effort to the project - the reality is that you should always prepare ahead of time and do your due diligence so that the community is built before you truly need them {live campaign} I hope this answer helps future campaigners and get going in their marketing before it goes live.

Now the advice:
I don't know if you want to spend money to get money, specially from a crowdsourced fund. I would avoid any paid ads.

Go to instapage.com and create and account, quickly draft 1 or 2 landing pages that show a funny story about the guy (no insult intended) make it funny or make it sad (one of the two) but make it engaging. Test both sites (they are free and go live for free)

Promote the bounce pages through twitter, instagram, facebook and quora
1. twitter is where the general urban sarcastic and information driven community is - target them with simple did you know, still have time to, learn about the funniest com. ever
2. instagram - post pictures. change your profile page information to display the campaign link. {never use links on the posts themselves} after a while you can "revive a post" by going back and you yourself posting comments - comment should be hashtags.
3. Facebook - people are the to hangout and could care less about your campaign (generalizing) so instead drive awareness about the guy and links to the landing pages. Don't mention funding. Get the readers out of the lazy environment...then ask/convert.
4. Quora.com is agreat to address the community directly. Those of us who are there are there to purposely engage. Feel to share your stories/the guy's story and the links to either landing page A or B.

*let the landing pages A/B do the asking or suggesting to donate, dont do that on your posts.
*before posting do your homework and write down the hashtgs that are being used by the people who would most likely end up donating or being touched.
For this, sometimes it helps creating a persona... what they wear, what they eat, where they hangout (including social media) what jokes they might like.. (post a joke)...
do this right away and hustle it over until weekends end...
By the end of the weekend you should have enough data to know if this was worth and keep pushing it...

If you want implement this simulatenously with another approach.

Best of luck.

Humberto Valle
Twitter @OfficialUnthink
http://Facebook.com/iwillunthink