Sarah, I appreciate your situation. I have worked with many sellers who have faced a similar situation. Quite frankly, there is no easy answer. Generally, tenants would prefer not having to find another place to live after a dwelling closes, and therefore, will find ways to not have the sale occur. One of the ways in which they achieve this is by not cooperating with showings or not keeping the place clean and orderly for showings. What has worked in the past is to offer the tenants consideration in return for their full support and cooperation. Some investors have found offering reduced rent will increase the likelihood of cooperative tenants. Also, I would not hide the fact that you are trying to sell your duplex from your tenants. Eventually they will find out and it is better if you are upfront and honest with them - specifying that your goal is to sell and that you expect full cooperation. In return for the tenant's cooperation, I would offer some incentive or consideration for the inconveniences of showings and/or open house appointments. You're most likely will not be successful without the support of your tenants. I hope this helps. Good luck.