I realize this is an older post, but I also have all my sewing and machine embroider stuff in the basement. We have limited space in the rest of the house. We have a dehumidifier running all the time. Our basement has a concrete floor with finished walls and is used more for storage/laundry than addition living space (like a rec room or finished basement). I like it, as it's close to a water supply for the iron and the upstairs room is a lot smaller. It's used for my office/craft room. I have not had any problems with moisture with anything. I do however make sure the pressure feet for the machine and serger are off the floor in case of water in the spring. We have a problem with water coming in if the ice and snow aren't shoveled away from the window in the spring. Hope it is working well for you!