yea you could do just like your thinking but since you don't want to grow many plants you could even split the room into two with plastic. get some panda paper (plastic, black one side white the other) and a couple self stick zippers for the plastic and get creative then you'll have veg and flower spots....as for the fans well all the equipment is pricey you'll just have to look arround for the best prices the inline fans are your best option.