You aren't going to make your initial investment back right away. Games require massive budgets be it broadway style announcements in magazines and youtube ads and paid cpa advertising, or blackhat with bought views, bought community spam, etc. The only difference is whether you already have a community behind the game projects or not. So by what you told us you don't have one, and this will in return lead to a kickstarter fail.
As for investing 6k, I would really think about what I wanted to do with it. For me I used 12k for a few YouTube projects like animation and design. That really fit me since I blackhat my way to create a community to watch my shows and such. This won't exactly work the same for you, because each campaign and person is different and the execution can't be the same. I firmly believe that if you were willing to invest you would have already done so in a project. We have people making money from buying traffic to cpm sites, we have people marketing youtube videos for serials and keygens, and we have people doing seo for clients. You take your pick of what you are interested in as it will ultimately decide your investments and returns. Just because I can make money with games and anime doesn't mean I can make money with selling traffic. The copy and sales strategy prep is not the same, and it does take research for me to write up sales copy for different niches.
Also, it needs time, in which I don't have a lot of since I'm ultra busy already. For you, your biggest enemy is going to be doubt and fear, so get ready to be blasted to death with those 2 emotions, and the paralysis that comes with them.