I was thinking about something similar when it seemed my 32 GB ram (Dell XPS 13) laptop was reaching the max.
I guess one thing to consider is whether you really are having (or will have) a problem with lack of ram.
See Computer resources concerns
I ended up buying a laptop that maxes out out 128 GB ram (but only 64 GB installed). I am still in the process of setting it up, But my old (32 GB Ram) laptop is still working fine, so did I need to do that? I don’t know. Perhaps not.
I was concerned about Predictive Loading too. But consider that with the max number of songs (covering each setlist).
Or maybe a different gig file for each set (just switch between sets).
A different gig file per song seems like overkill/unnecessarily burdensome with a laptop with 32 GB of ram.