After I posted I realized plant count is probably your reasoning. You're doing an awesome job. I remember on Overgrow the colosseum and those 8" hanging pvc pipe vertical grows, but the numbers were bananas. Sorry if you said this already but...so you veg in a separate room I assume without any vertical support. Do you top/train in any other way (in veg)?
Honestly I've never considered a vertical tree type grow, now I am though for the same reason - numbers. I love stuffing 12-24 in a 5x5 no veg time but that's almost a life sentence. Again thanks for sharing!