I have now split everything into three separate databases. Moving things around temporarily maxed out my 8GB of ram (MacMini M1) but hoping this helps resolve some issues.
Also, FYI, I have indexed, not imported. I have other apps that need access to the majority of these same documents, and I don’t want/need copies of everything inside DT.
After splitting I closed 2 of the 3 databases as I am trial-ing DT primarily to see how it might help me declutter my genealogy records. Having only one db open has dropped my RAM usage for DT down to around 2GB - much better!