Hi,
Bill is right if the church retains title, however I recommend that you and the church create a partnership through an LLC.
By creating an LLC the church can convey title and retain a 50% ownership interest and receive half of the yearly write-offs and get 50% of positive cash flow.
The property would be owned by a separate entity and independent of the church non profit organization status.
Make sure the church understands the structure and they would like to partner rather than sell and that they understand the operation and timeline to create a viable rental from their vacant home.
Make sure full disclosure is made and discussed so all church officials understand, reduce your plan to paper and make sure the church board votes in favor of and signs and acknowledges the plan so there are no future repercussions.
This is a great opportunity however many non profit organizations tend to have some board member or executive who misunderstands the original plan because it was never reduced to writing and never acknowledged, so to avoid future problems make sure all understand what your doing.
GR