4x4x9 setup?

so i am currently building out my little 4x4x9 hidden room to grow in. I plan on running 4-5 plants at a time. The basic design for that is pretty easy. But i can't seem to figure out how i can rig it up to where i can have a perpetual type grow in that area. if i could have 4 plants flowering and then during the last 4 weeks of flowering also have 4 doing their veg that would be awesome. Any design ideas? I'm not sure how i could split the area in half to do that. Being 9ft tall i'm sure it could be done somehow.

Room can easily be vented to the attic. Rh and temps should be easy to control. My concern is bow to have a flowering and veg area in the same space. Veg area only needs to be able to run for about the last 2-3 weeks of flowering so that when I harvest I have 2-3 week old plants to move to the flower area to either veg for another week or so or to go straight to flower.

A well setup attic is supposed to be well ventilated and near the temperature outside. In winter they should be pretty cold. Venting hot air into it creates a shit load of humidity, and then comes the mold. You should vent directly outside and use insulated duct or else it will drip with condensation.

- Jiji

good advice about venting directly outside. I can do that by running the flex duct to my existing attic vent.

take 3' of the height to make a veg cab n you still have a 6' flower room.

Would this work?

https://www.dropbox.com/s/72w201ta47xihvl/ROOM.jpg?dl=0