Smaller Bubble Containers Less, water nutrients and waste idea

Hello Everywone, this is my first post with a question, before setting up a grow I would like to know a good hydro setup, I have seen plenty of videos with Jorge Cervantes, so very good idea on how to grow, I would like to get into SOG method, shooting for a 4" x 4" grow area with 600 or 1000w HPS so hears a pic of a possible setup that i might consider being its low profile and compact and using lot less water then 5 gal buckets, in terms less water less waste of nutriens, far as I see nutrients not cheap, with being raised not to waste food, same idea would apply to the plants, I have searched and searched on DWC ideas lot of people use very large containers, my biggest concern is the roots might get to large for the small container and clog the airstone and sufficate the plant. Any info or simple mods would be helpful,

Thank you for looking and Love, Peace and Taco Grease!

Limiting rootspace will limit the growth potential and yield of the plant. So most growers think it is worth the extra nutes and effort for the greater yiled. I consider 2 gal per plant the minimum.