saving and duplicating basic site & theme settings

I am looking for a way to create a site layout using a particular theme, and customize its options, the save that so that next time I go to build another site with the same theme, layout and options, I already have much of the duplicate work completed. I am wondering what the best way is to do this with a theme that I use that has a built in page builder? I would like to be able to keep settings in the theme options, customizer, and also save page layouts using the builder. (Could a child theme store all of this info?) Saving plugins and their settings would be really awesome, but not necessary. Streamlining is the purpose of all of this.