Well, when several people are working on the same project they "share" the transformed data by connecting to the same EC2 instance. The way data is transformed is via 4 scripts, 2 notebooks and a bunch of manual operations, so no one really wants to touch that. I spent my 4th day working with a contractor to write a Makefile that reproduces all the steps for ONE project.

I talk about adding infrastructure in my original post, but I'm very well aware that my time is currently better spent consolidating the existing as much as I can so the clients can get correct results faster.