Just get the air conditioner and an air purifier. Set the air conditioner at 75f to 78f and never open the door to the room until upkeep is needed.Does the room have a window? Open it at night this will allow fresh air return. Use alot of fans, push air everywhere around the room but not directly on your plants run a low humidity during flowering and it may not stink to much. The air purifier will also cut down the smell and continually re- ionize the air allowing you to never have to open your growroom. Good luck..... Keep it simple, the more complicating the more problems