My house facing West and Sits East. The main door we use is West, but our front door actully is Southwest. I have a hill (mountain) behind my house, but I also want to put a waterfall in the backyard. Is this a good idea. If so what size? I have friend thats house has is in the same direction,and the door they use is actually in the same spot as my main door and she was advised to put a waterfall in her back yard instead of her front yard.....Please advise