I need a dehumidifier urgently ~ anyone can intro me good but not too expensive? Do I need to buy one for master room or can shared among the room if not I need to get 3 as in one for master room and one for common room and one in living room~ please advise me if you have experience ~ I need it bcos of the moist at home and I have been seeing book live around my house mattress and ceiling ~ I really hope can get rid of it