Hey I was going to build my own grow room using a spare bedroom but I believe I am WAY over my head so Im going to start with a basic closet.... My idea is to put 2 5V PC fans on both sides of the top part of closet with a PC PSU powering it. Also obviously on top of the closet will be the light so this (the fans) will cool it. Smell here is extremely important. It must never smell so I need some kinda of filter I believe. From here I dont know what else. Party cup or pot? Kind of soil? Water/light cycle? etc... A grow room I more or less had a idea but a grow closet no. All of this will be in a top story attic and I live in Spain (hot humid summers, very very very cold winters) Budget is around 100-150.