5 frames nucs should be 2 frames of brood, 2 frames of honey, and one frame of empty comb. There should be a good population of bees.
To maximize the split, if you wanted to start each nuc with a laying queen and only two frames of brood and bees, how would you fit out the other three frames of space (ie. honey frame, feeder, empty frame, etc.) to maximize growth for some marketable early summer nucs for sale?
I don't understand. A June nuc is an early summer nuc. There is no time for growth because you are already there. Either it's in marketable condition or you have a nuc that you should be able to overwinter as a single.
You will not have a feeder in the nuc when you sell it. When making the nuc and introducing a mated queen, some folks put a frame feeder in to help insure acceptance. When they pull the feeder they put in a frame of empty comb and the nuc is ready to be sold.