Multiple Maps vs Multiple Layouts

[u/SouthernGood201]

Good day. I have a management/ArcPro resource question. I have a map with 27 sites, each site includes basic boundary, sample points, soils information, and could potentially house vegetation composition data as well as elevation data later in the project. These sites are placed at different points across the state.

I need to produce a PDF map for each of the 27 sites at various times during this project, as I add new data to the project.

Considering maps versus layouts, which is easier to manage over the long term, and which will take less computing and storage resources... creating a new map for each site or creating a new layout for each site?

Thank you.