Hey, im not sure if i understand your plan exactly, but if your planning on making a closed system. You gotta understand a couple things. The enclosure will keep the humidity very high, which means that it will be easy to overwater them.( the moisture will rise out of the ground and evaporate, then condense on the ceiling then fall back down onto the ground. If you add too much water to such a sytem youll end up with root rot very quickly.
Also, weed gets pretty big. Too make sure it fits inside youre gonna have to start LSTing and topping pretty early.
Just some things to keep in mind.
Personally, i wouldnt suggest a closed system like this. Bugs WILL get in, regardless. If its a closed system that means more chance for a single type of bug to dominate, like indoors with aphids or spidermites. The great thing about outdoors is that you get predator insects along with the unwanted pests they feed on. In a closed system you may end up with just the pests.
For smell id suggest planted other really aromatic flowers and plants to mask the scent. I would almost guarantee you that even in a closed system, unwanted scents will still escape.
Hope this helps, and good luck with the grow!
