Oregon Coast II Underpainting

I think I will have to set my studio up as an assembly line to produce more paintings. Doing them one at a time, I have lots of drying time in between, so maybe if I can choose several images at once, I can do all the tinting of the support, then all the underpainting, then continue doing each layer on each painting at around the same time. I have never done that sort of thing, so I don't have things set up correctly, but that can be changed.