My friend did a sucessful kickstarter recentlyhttps://www.kickstarter.com/projects/1512506318/ghosts-of-gaia-post-apoc-badass-female-miniatures?ref=nav_search
If you watch her video it tells the story of how she started and why she was doing it this way. She hit her initial target almost immediately, but then had "stretch goals" that could be unlocked as certain over targets were hit, which allowed existing and new backers to buy/access/pledge more which seemed to work really well.
It's a case of getting your links out there and drumming and keep drumming support, I did this for my friend, not because I buy any of stuff but thought it was an awesome kickstarter.
Essentially you'll need attractive pledge levels and a plan to see you through from what I can see.