I have seen far FAR worse first grows than this; all-in-all, I think you're doing very well!

Some questions: what light(s) are you going to flower with? HPS? What size? CFLs? You can flower with CFLs, but you won't get much yield that way. But HPS lights generate a fair amount of heat, and I didn't see a cooltube or any type of air-cooled reflector in there. Just gonna leave the doors open when the lights are on during flowering?

I wanted to do pretty much what you are doing. I have a closet I could use which is about the same size. But I couldn't think of any way to cool it properly without cutting holes in walls or the door or the ceiling for ventilation in/out, and the woman nixed the idea of me hacking on the structure of the house itself, so I had to go with the cabinet concept (which has worked out fine). Actually, I think I like cabinets better, so it's just as well that she nixed my closet plan.

Oh, on your pruning/topping, and taking cuttings for clones: when you make a cut, dab a little of your cloning gel on the exposed cut area, not just on the cutting but on the plant you cut from. I just tried that a couple of days ago when I did some topping and pruning, and it seemed to make a difference. I figured if it encourages roots to grow in cuttings, maybe it encourages new node growth on the 'mother' plant after a cut too, and it looks like that theory was valid. Worst case, it certainly didn't do any harm, but I think it actually helped.