#1 and #2....Putting a fan in there to keep the air moving wont really cool anything. I'm just afraid it will get to hot in the closet during the summer. I want to be able to keep the temperature under control, and humidity.

Would it be easier to grow in the closet with it bare, or build a scrog inside the closet? Which would cost more, considering that I would have to most likely buy something to cool the closet, and a dehumidifier to control RH?

I like the scrog idea, but do not know much about it.

P.S.
On the right side of the closet, there is a fist size hole where someone has punched the wall. I was wondering how good of an idea would it be to use that hole to fit an exhaust extension leading into that?