With 15 yrs experience, about 5 years ago I refused to accept 1 yr leases. Why? People who sign 1 yr leases tend to be more transient, ruin properties, and vacancy is expensive. It's interesting - bit now my average tenant stays over 4 years- I never increase rent- but hey ( vacancy is expensive) and longer term renters tend to require less repairs. Multiple generalizations here- wanted to see if your experience is similar. I tell new investors to never sign a lease under 24 months. This is one of only a few proprty management issues I feel strongly about.