Lots of interesting questions there and a lot of very tricky challenges.
As you say, the cleint continously requiring changes that you can’t possibly predict adds a much great level of complexity to this kind of job. Great of you’re working by yourself on your own project because you can make the rules up before you start – but when you don’t know what the rules are likely to be, that’s when it gets hairy!
I did cut a small piece like this a while back in FCPX and I was amazed at how quickly I got in awkward spots once the client started picking at the edit and the music. (The worst part was trying to nbegotiate around transitions which quickly make a mess of your timeline and the ease with which you can manipulate it – or maybe that’s just me.)
The only thing I would say from my experience is that the best way I have found to edit music (and let’s face it most of the time most of the music we use needs editing) is to cut it in a secondary storyline. That makes both the actual music editing easier and the swapping out of different music choices and edits.
Simon Ubsdell
http://www.tokyo-uk.com