Just find a container you like the size of and drill a bunch of 3/8" holes in it to make a net pot out of it. I did that with a 2L plastic tobacco can and it worked great to move a mother plant in the same sized can growing in ProMix to DWC.
No taper to the can so suck some electrical tape on then twisted it into a tube that I ran around the can then kept going flat to hold it on and cut a hole in a RubberMaid lid it would fit in, Tons of roots in a few days.
Single plant Scrog that gave me 8oz of bud and almost as much sugar leaf and popcorn.
There's no need to go deep like you propose. I always stay an inch below the bottom of the net pot at least. No top feed other than a bit with a turkey baster for a couple days until roots emerge from the pots then the popping bubbles keep them wet until they get into the nute water.
Who needs more roots than this? Different grow using 4 -5 clones in each of 4 5.5" net pots. Not a ScroG.