We figured out how much we needed to survive for 3 - 4 months, plus the cost servers for a certain amount of time, then factored in Kickstarter / Amazon's cut and the cost of the backer rewards.
We kept getting a number that was too high. So we eventually decided "Screw it! $35,000 it is!". It's still probably too high... but we wanted to avoid, at all costs, asking for too little money and then not being able to deliver to our backers.
We figured out how much we needed to survive for 3 - 4 months, plus the cost servers for a certain amount of time, then factored in Kickstarter / Amazon's cut and the cost of the backer rewards.
We kept getting a number that was too high. So we eventually decided "Screw it! $35,000 it is!". It's still probably too high... but we wanted to avoid, at all costs, asking for too little money and then not being able to deliver to our backers.