This is termed as Ghostwriting.
Just post the chapters as you go and if people read that part also you will be paid.
I have also read that it you self publish and fail to market your book properly, it will be dead in the water within a month of its release.
Publishing after is just the beginning.
Pick a name that is easily remembered, has few syllables, is easy to spell and is original.
So far, more than 90 workers at Google and more than 300 at Amazon have signed this letter internally.