They clearly need to be repotted..a veg to 28 inches would put you over 50 inches by time flower is done.hope you got the room brother and the light to handle it.good luck.
I hang for 12 to 14 days then trim then jar it up burp for a week every day then 2nd week every other day..should be good..3 days hang ain't enough to dry anything.
I've always blew the air over the light never pulled it..was how I was taught.your set up does not look bad at all.better than a lot that I've seen..you are on your way buddy..