4-1000w per 8x8 space and only have 3-4 plants per light

1-400w for a closet mothership is all I use

buy a few big vortex fans and make a duct box to lead into.
Humidifier and de-humidifier, baby fans, Pandafilm, 5galbuckets with 2 gal inserts a good waterpump $100, to feed from a res.

Dont grow in hot climates (summer) unless you have a "good enough" a/c in the room

Keep the mother/clone area simple and worry bout the flowering room setups efficiency

Remember what money you put in each grow you need to yield so dont worry too much about nute products and worry about good water and proper nute levels for your specific strain.