So after a year, assuming you spend no money at all, you'd still be in the hole to pay back your backers.
I personally only use Kickstarter to play "patron of the arts". I fund art projects with the assumption that I will get nothing in return. If I'm lucky, I get some nice art to enjoy (so far one of the projects has come to fruition, where I backed the recording and distribution of an a cappella album, and recently got my CD).