Hey haze andy.. Big smo uses those air pots, I briefly asked him about them on this thread
https://www.rollitup.org/p/12612799/
I have been considering them myself but as you say they sure are expensive. I have not used those cloth pots either since I don't think they were popular round my neck of the woods when I started growing seriously, I've stuck to what I had but looking at that pic from nevergoodenuf think I will try those! Nice roots NGE!!
As for hole drilling, done it on a couple of my smaller veg pots @6.5ltr. It helped. I noticed a bigger root system or at least on the outer areas that you could see when potting up.
@nevergoodenuf What else was in those pots, Coco? How long was that lady Vegged for? Cheers