Howdy
Looking cool and cant wait to see how much time/yield these types of small stealthy systems provide. I would expect this current set up to take longer to veg and flower and the yeld would be small amount of personal smoke. What I love is the ingenuity involved. Here is my take on some possible future improvements.
Firstly this small system set up for hydroponics is going to give you more weed faster. A hydro system set up in this 3 plastic tote configuration with the bottom being your tank for a drip system.
The bottom tote is the watter tank it will need to be be fitted with a submerged watter pump, feed lines, air stone and airlines leading to a big fishtank airpump. Cut 6 holes in the lid of the bottom tote this will hold your net cups and grow medium. (6 plants may be pushing it for such small spot)
The middle tote is the foliage area. Cut matching holes for each plant in the bottom of the middle tote. Then line up and attach the bottom totes lid to the bottom of the middle tote with some holes, nuts, bolts, and washers. Keeping in mind that your going to be bolting the lid of this tote to the bottom of the top tote cut a large square out of it.
Your top tote should be the same size as the others as its going to be housing a lot. (lights, fans, timers, airpump, etc) Cut a hole in the bottom of this tote to match the hole in the lid of the middle tote. Again line them up and drill and bolt together.
Now lets talk lights..
In this configuration HPS isnt going to work way to much heat and not nearly enough ventilation. So yeah your stuck with compact fluorescent, t5's, or LEDs. Your light setup will need to be able to be raised and lowered. It takes 10.5 of those 115w compact fluorescent bulbs to equal the output of a 400w HPS even a worse ratio for the t5's. So those compact fluorescent are the way to go here.
As for the rest of the build I would use your head and think things through, common sense and some research on hydroponics. You will need to be thinking about proper ventilation, the configuration of your air lines and pump, the water lines/feeding system and in a way that it all fits the enclosed containers yet is easy to dissemble way so that you can take apart to tend the crop. I have my version of this pictured perfectly in my mind and am positive its doable.
Well like I said its just my take on the design and improvements. What ya have is a start and I can not wait to see those babys grow. Looking foward to more pictures and your thoughts on hydro. Peace out and happy smoken!
Good Luck!!
Syriuslydelyrius