I would make the starter first and hold some of that back. Try to replicate the process outlined here:
https://www.denardbrewing.com/blog/post/Start/
I don't have the stir bar or flasks but my starters all come out fine. Usually I only give 24 hours. It definitely makes a difference in quality of the finished product but also stretches your yeast dollar. You could easily quadruple the number of cells before pitching, and save the unused portion in mason jars in the fridge.
So make maybe a 1 liter 1388 starter (using honey and a pinch of Fermaid K), and split it between the gallon of mead and the 4-gallon 1.070 Belgian blond that I want to brew? I do have stir bars and flasks and stuff. Then save the trub from the beer, that yeast might be tired but should be okay for reuse.