Most of that was fairly easy, except that the POS program that sits in the actual data only allows exporting data in one single format - PDF. Converting that PDF file to a CSV that I can feed into SharePoint was one of the nastiest things I did last year. I did manage to get it to work though, by toying around with pdftotext for a while and exploring its command line parameters.
It was a pleasure to use! It took me a while to discover the correct set of command line parameters I needed, but I got it to work! Thanks, xpdf!