Update........Im still waiting for a tent, so in the mean time I rigged the ac unit to work without cutting a hole in my shed and it made a huge difference. Started running it Saturday and it only takes about 1 1/2 to 2 hours of running the unit a day to keep the temps. exactly where they need to be and it made a huge difference. The plants perked up, turned really green, and have already grown a few inches!