A seller disclosure form can give you an idea of potential problems, but it should never be considered a substitute for a professional home inspection. Sellers may overlook problems, and often not be aware of them. It's smart to use the disclosure as starting point, but hire a pro to get the whole story.
If you’re refinancing an FHA loan, try to schedule the closing for as close to the end of the month as possible. Unlike conventional loans, on which lenders typically charge interest only up until the date the loan is repaid, the FHA charges interest through the end of the month, regardless of the payoff date. That means for the period between the time you close and the end of the month, you will be paying interest on your old loan and your new one.