I think a tent is great, love my tent it will help you isolate your environment but to control it you will need to add ventilation no if,ands or butts.
Your plant's need air, moving air, fresh air, if you stick them in a tent, with a light and no venting it can open up a lot of problems.
I know catch 22. Which one the cart or the horse.
Hang in there Awaken5