|In need of idea's!|Indoor Grow|Please Help!

Hey everyone, I recently decided with a friend to grow a plant or two indoors. Currently we have what I like to call our "Veggie Box", Which is the box we will have the plant go through its vegitation stages in(Pictures will all be below the text). Now we also are planning to make a "Flowering box" which will be where we begin the slowly lowering our lighting hours to start the flowering stages of the plant. But were stumped on how we should build something big enough to conseal plants. If anyone has any easy discreet ways please offer them up!


Picture Of The "Veggie Box" so far|

Thats the drain bucket(The butter container|not complete yet) the pot (the brown thing inside the butter container) and to the right is the fan, Not wired yet because im not sure thats the spot im going to put it as it would be pointless there haha.

Ask yourself this: Is the 15-30 dried grams of bud from a computer case worth several months of effort?

I don't think you understand. Once the flowering stages come around ill be moving my plant to a bigger container so it has room to flower and grow. Could possibly even end up topping it. All I need is an' idea for a bigger "Flowering" box.