I need advice on my perpetual grow

Im setting up a perpetual grow where the goal is to harvest 4 plants a week. I'm planning on it taking 15 weeks from the 1st clones until the operation reaches sustainability. Thats 2 weeks in the cloner, 4 weeks of veg, and 9 weeks of flowering.

Right now the mothers I have to choose from are:

White widow
Super Island Sweet Skunk
Sour D
MK Ultra

Is it better to focus on only 1 strain, or should I take 1 clone from each type of mother each week? And, if I were to pick just one, which one grows easily indoors and likes to be cloned?

well you have all those mothers, so why only clone from one plant? 4 mothers is a lot to keep track of, however, you should consider your options and pick two mothers. thats what i would do