I am 48, and started buying houses when I was 34. I put the minimum down and put most of them on 30 year loans. As I have gotten older, and closer to when I want to retire, I have decided to pay off mortgages. I also have enough income to comfortably quit my job if I wanted to. I have paid off 5 houses in the last 2 months and only have 4 with mortgages, which I plan on paying off within 2 years. I see the advantages to both side of the debate, and I think it all boils down to what you are comfortable with. When I was younger, I was comfortable with more debt. As I approach retirement, I want EVERYTHING paid off, so that is my goal. Sit down and think about what you want out of life, what passive income you want, and at what point in your life, and then make a decision. The good thing is, even if you pay off your properties and later decide you want the cash out of them, you can go get a loan. Good luck, sounds like you are on track to be successful!!