That being said, I just spent 10 years renting the same house. My rent did not go up during that time, and my landlord had fairly average maintenance costs during that time including: * replaced broken fridge * paid to have dangerous trees removed * paid to upgrade flooring after a sewer backup flooded the house. Most of this cost was borne by insurance.
My former landlord is now selling the house. The market value of the house is double what it was when I moved in. That sounds awesome, but that's about a 7% rate of return, which is quite a bit less than if he had simply put his money in an S&P 500 index fund.