dude that is it a nice light soil and ez to use fertilizer
less is more
I have grew a lot in 3 gallon pots maybe a 5 gallon pot time to time
manger them well and you can do very good in a small space
a couple pounds out 800 watts in a 4 foot by 8 foot space with 8 plants in 3 gallon pots
not that hard to do
peace and be safe
Dequilo
PS you are right on the SOG if plant count is not a problem for you @beacher