Bro I have zero clue about your business, market, model, # of employees, lights, buildings, how long you have been in business, competition, testing requirements ect. This is all going off general statements and vague info. I'm not trying to tell you how it is and by no means am I claiming I'm weed jesus and already know everything. There are way to many conceded "master growers" like that in this industry already filling that role. Just throwing out what Ive seen time and time again.
Just for info purposes, We are not having problems. We started growing in peat, and are currently growing in large grodans. Our facility is enormous and we are kicking around the idea of doing one small room as a premium grade product (although to date we have been pretty pleased with what we have been producing)
I understand that approach. Ultimately your market dictates that. Lol that info from the get go would have been helpful. Something like 40 lights wouldnt be too much of a chore. More then that you might wanna start looking to buy it already mixed from someone. Just be real careful where you get your materials and bases because if they are testing for heavy metals in your market you might fail that test if you arent careful. Same thing goes for nutes also tho. Why we always had to get raw salts tested before using them. Batches are sometimes not consistent. If you are in Cali or Oregon it's a pretty safe bet if bought in state that it has already been tested but might want to just for the peace of mind still. That would be my only worry about mixing my own soil minus the labor.
I started commercial growing in Las Vegas, and at the time Greenlife productions was the only one doing a no-till super soil. They seemed to be doing a pretty good job (I liked the quality of their product) however I dont know them. Someone else suggested looking up build a soil which I plan on doing.
Build a Soil (B.A.S.) is from out here in CO. Couple of people use them in warehouses and lots of the OD and greenhouse people in Pueblo use them. Nice since you can buy lots of bulk.