I was going to Veg and Flower my plants at same time really, I can build a tent, I suppose, but I thought this would Reduce my available space. I was going to use the whole space for veg, then flower. I have a good few hundred english pounds to spend on some Ventilation, I wont be getting A/C so I would need an alternative. English weather isnt great tho, so I didnt think this would be a problem. I was also going to install a Carbon filter, there is a big hole in the wall I can fit this to with some ducting.