unique, and I like it! I'd say it looks like you should be able to make it work for two plants, and screw it, finish them off in there! its your first grow, right? My first grow was 3 plants I adopted inside the PC case that I'm veg'ing in now, and I ended up with two females, gave one to a friend, and got 1.5 grams off a very unhappy plant in the end, but the amount I learned was worth it! I'm finishing up round 2 (from clones given to me) and starting round 3 (the ones I'm trying to start now), and I'm learning more and more every day. I started off thinking that I would be growing in a PC case for quite a while, but towards the end of my first grow I started building the box I'm flowering in now. And now I'm thinking about going a step further and getting a 150w HPS to replace the CFL's.
Once I have a better place to grow (aka more space), I'm sure I'll be stepping up to a much more powerful setup. Growing is addictive, I can go a day or two without smoking if I'm REALLY busy with work and school, but I spend probably half an hour MINIMUM every day with my plants.
I think your plants are looking good. If I were you, I would plan on flipping them to 12/12 once they're a little bit bigger to weed out the males, and I'll have my fingers crossed that two of them are girls and two are males, that way you wont have to try and pick which ones to keep and which ones to ditch. Once you sex them, either let them keep going or switch back to 24/0 or 18/6 and let them veg a bit longer before you let them flower.
My W.Widow is about the same size as your E.Misty's are, I'm anxious to see how our grows turn out!