1. Hi AJ - Looks like you have very impressive project ahead of you.
2. Are you going to add any other secret amendments to your mix?
May be add some extra perlite to make the soil less denser and more airy.
3. How do you plan to water 188 containers? Considering where you live, you may need to water twice a day during mid summer. Now, that is a full time job.
What about some sort of automated watering system?
However the answer can benifit all of us.
I will not have close to that number of containers, probably 30-40 at the most. I am trying to set up some sort of automated watering system for them. Probably I will experiment with some self watering earthbox like setup as well. This will allow me to take a summer vacation, and not worry about my plants dying. Since these peppers are so precious to us...I cannot depend on my neighbors or, relatives to water them everyday.