My wife and I purchased a 40 year old house that had beautiful hardwood floors. Of course, these floors were under a layer of carpet, padding, floor tile, and tar. We had to rent a floor sander (with 20 grit paper) and a Router (same grit) and it took us several days to get that stuff up. Then we stained and sealed the floors. Looks absolutely beautiful. Worth the effort. Even if you have to pay someone else.