Why not crowdfund the new season?

So, after hearing Craig's comments about there possibly not being enough money to fund the new season, I'm wondering why not go the crowdfunding route? I tried to find the budget for season 13 as a baseline but couldn't but was able to find a general cost of £250,000 per episode when I Googled it (not sure how accurate that is now with inflation and all). At any rate, this has been a successful means of funding a show or movie for studios in the past. Veronica Mars being one example and hitting a $2,000,000 goal. Why can't this be a viable option for Naylor and co? Anyone have any theories?