Can I bulk download files/orders once they have been submitted?

All plans come with FTP access so yes you can. Some FTP clients can be set-up to automatically synchronize directories so you could create a simple workflow to download orders stored on PrintNow servers to your local servers on your network. In addition PrintNow offers a Order API that can be used to push orders to 3rd party systems or even bidirectional web service options to push back shipping and tracking information and to close out a order in PrintNow automatically.