hey dude if ya only wantin 2 do a few plants i'd say put em in ya wardrob (without ya clothes obviously) i'm doing 3 northern ights in a bubbler in ma wardrobe and it's sweet 4 them thers plenty of room 2 gt am nice n big and u can fix a lock on aswel.
ps if ya only doin a few u dont need an extraction system just a couple of smal fans and open da door a few times a day.