Cheer for ur help mate, yea i realise bout the insulation, plenty of ppl have made that mistake around here. Bit of a give away wen snow is melting as its hitting ur roof lol as for the tent, i thought about making a small cabinet out of an old bedding box lined with mylar and fluoro tubes, using pc fans for intake and exhaust and a DIY carbon filter. I reckond it all up and it would cost a lot less than a tent. Just trying to keep everything as low cost as possible really. Its my 1st ever grow n only for me, so nt too botherd how spectacular the results are to b honest, as long as i get a bit of smoke out of it