Sounds like a lot of work, doesn't it? and I have probably left out a few critical details at that. But really, it isn't that bad. Less than an hour to come up with a usable epub that will pass epubcheck.
I'm an ePub virgin and so all talk of styling, reasonable values, etc. is like Greek to me.
My husband is the InDesign whiz, but he has no knowledge of this new format.
Looks like some in-depth study is needed -- and I fear it will take more than an hour!