🚀 go-pugleaf

> 1.We're on Mac, client is on PC. Is this a problem?

No. Stick to opentype fonts, though.

> 2.Do the files have to reside on a server accessed by the client or can they be transported (emailed, etc)

That's the best workflow, but you can move them around via FTP, email, 
etc. Problem is that you need to package everything up since InCopy 
doesn't retain proxy images.

> 3. What are the challenges we designers will face?

Assuming everything stays on the same server, simply remembering to 
export stories/assignments for the writers.

> 4. How easy will it be for our client to learn?

It's quite simple, but I would stongly suggest hiring a consultant to 
help you out.

> 5. Will the client only need to purchase InCopy, or will they also need to have InDesign on their system?

The beauty of InCopy is that InDesign isn't needed.

HTH,

Bob