I just bought five 84 x 54 in mylar water proof disaster blankets for 8.99 on ebay, as long as you are handy and can seal it off, you could basically build a grow tent for under 30$ you just gotta make sure whatever you are gonna hang your lights from inside of it is strong enough to hold the weight. Beautiful new pictures man, they stretched out a whole lot there at the end huh? Anyways thanks for the update, these next two months are gonna be amazing for you, at the end of a grow I have a hard time chopping the beauties, but alas they must be smoked haha. CHeers!
-slinger