IMO, this is not the time to even consider a new home purchase as the housing bubble is about to break. Homes in general are commanding inflated prices and when it comes (breaking bubble), lots of would be owners will be left holding the bag so to speak.
In our situation, all of our rentals are paid for except one and that one is a fixed rate mortgage which is something rare today. I would never even consider a variable rate mortgage on any real estate, especially today. Lets just say, the one with a note due on it, the finance rate is well below the current rate today. I could pay it off tomorrow but why bother as everything associated with it is tax deductible and like I've said in the past, we need all the deductions we can get. I dislike giving the government any money as they are a very bad investment today. Have to be the poorest managers of money there is.