I kept my chins in a semi-finished basement for awhile with a dehumidifier, and had all kinds of problems come up. I don't know if it was just my luck or what. I had one get a URI, another get fungus, and another get a terrible leg infection all in the span of being in the basement. At one time I had 2 dehumidifiers going and I got them moved out of there ASAP. The humidity was my biggest struggle. Where there is humidity, there is usually mold. However, others keep their chins in basements with no issues. I think as long as you can keep your humidity under control you should be okay.