For a similar price and for use trifolding, bifolding, and scoring for card/cover stock folding, would you chose a Baum 714 Air-feed folder or a Grafipli Graphic Wizard 3810s air folder?

between those two go with the baum, BUT have a look at the Morgana Major folder, it is really a step forward from these manual setup machines. With much easier setup, using digital fold plates, you will waste less and can have less trained operators (lower cost). New to us in North America but Morgana has been around the UK for a long time. We own one and love it that was after owning 2 baums in a row.