This is one of those issues where I can read the statute, but getting you help really depends on someone who practices day in and day out down there. I urge you to find a lawyer experienced working with mobile homes in the Princeton/Beckley/Bluefield area. The landlord should not allow these conditions to exist, especially if a risk to health (from standing water/mold) and safety. Whether you can withhold rent is something you must ask a local lawter about - the statute (WV Code Chapter 37, Article 15) doesn't address that. I would also talk to your local building inspector and board of health, as they likely have legal tools they can employ. The statutes do protect you against retaliation by the landlord, but he will likely make your life unpleasant. Thus again, get an attorney to help you and run interference for you. Don't let him get away with this - been going on too long.
PS - Have been in your area. Beautiful country. Was in Princeton for the 4th of July fireworks in 2006.
To questioners from West Virginia & New York: Although I am licensed to practice in your state, I practice on a day-to-day basis in Massachusetts. I answer questions in your state in areas of the law in which I practice, and in which I feel comfortable trying to offer you assistance based on my knowledge of specific statutes in your state and/or general principles applicable in all states. It is always best, however, to work with attorneys and court personnel in your own area to deal with specific problems and factual situations.