Exactly thinking that… so I’m asking why are you changing prod qty. I wouldn’t so you can track how often you aren’t hitting estimate. If you plan for x and only make y that sounds like a problem.
Before we can help more we would really have to understand why the qty is being changed what’s the objective/roadblock there?
Scanners get 2d, the barcodes can get quite large for the type of scanning your indicating. We use symbol but there are lots out there look at reviews and research symbology a bit.
I would personally avoid thin clients we went that route, and we found if you have a cache issue on a machine because everyone is using the same cache clearing it can become a nightmare. We buy refurb Lenovo mini clients as full desktops and they are cheaper than thin clients with win10 pro on them.