Everyone's circumstances will be different. If you have a financial adviser it might be worth a call / appointment to discuss things. You will need to make assumptions about any growth in the value of the investment, weather or not you believe that your current rent payment will change over time, and what if any break you would have on your federal and state taxes. Also include your costs to dispose of the property if you decide to move out of state. Yahoo Finance has a thing that i have linked below that might help you as well.