Here we go:
Betsy Mitchell's developmental and line edit came to $390. I've already committed to that expense, so if the Kickstarter doesn't make goal, I'll be paying it out of pocket.
Kate Baylay's cover art will cost $1000. We were able to agree on a price that low because I asked only for the rights I would definitely use, and all other rights remain with Kate. So that she would be able to start on the sketches, I've already committed to a downpayment on that, so if the Kickstarter doesn't fund I'll be paying $330 out of pocket for her time.
Design for Writers will integrate the typography with the front cover art, and lay out for the spine and back cover, for $319.
For designing the interior of the book and preparing all the ebook formats, Design for Writers quoted $309 for a version with no interior illustrations.
An ISBN costs $125.
The $700 I've budgeted for shipping should cover both shipping rewards to backers and shipping physical proofs of the cover art and any giclee prints for backer rewards to London, so Kate can make sure the colors reproduce properly -- something we might need to do more than once.
I've budgeted $300 for promotional items from Vistaprint. For my other books, I've used 4"x6" postcards, which are big enough for a wraparound cover with the back cover copy big enough for readability. Kate's art will be so eye-catching, I wouldn't want to go any smaller. (If you've ever launched a book, you know that's actually a pretty low number for an entire promotional campaign, even from Vistaprint, but in the most basic version of the project I didn't feel I could ask for more than that.)
Uploading the electronic and print-on-demand formats to the big book distribution companies is free. The cost of printing and binding only kicks in when someone orders a copy. I'll be ordering author copies to hand-sell at conventions, but in the basic print-on-demand scenario I'll pay for those out of pocket.
The project cost calculator that I got through the Launch + Release course estimates that I need to budget $629 for reward fulfillment and $419 for Kickstarter fees.
But that only takes us to $4,191, so how do we account for the rounding up to $4,500? That remaining $309 dollars (and $31 of those would be Kickstarter fees) is what I hope will be enough for whatever self-publishing cost I didn't see coming. This is my first self-publishing project and my first crowdfunding project. If I end up needing to ship proofs to London four times, or shipping the giclee prints to backers in sufficiently protective packaging is costlier than I thought, or the book designer's estimate is too low because of something I haven't thought of, the fudge factor covers it. And if I were to end up not needing it, I'd use that money to pay C.S.E. Cooney to narrate the audiobook, which every backer would then get.