I was in a similar situation, and I included the lease agreement and renter's insurance in ROC packet. It is also important to include a letter explaining why you have two addresses and why you may be living separately part time.
I answered Yes on question 22 and for the explanation I gave the second address and mentioned there's an attached letter with the explanation. I also didn't file AR-11 because it didn't make sense.
FWIW, my ROC completed without interview or RFE.