While we could sync a shared FTP or other folder, the posts about accounting run off a network share has me writing you may be really upset on the results.

That said, is the folder small enough to put on Dropbox and let Dropbox do it's magic?

Remember that with so many blowing up their accounting files on a network share, let's hope you know enough to not try that. Just sync to a network FTP share like FileZilla and your choice of syncing.