Power/water lease questions, house hacked

I have a rental in which I have an attached mother-in-law suite and then the main house. The MIL pays an all inclusive $1100/mo and is on a verbal lease. The main part of the house, I put on  regular 12 mo lease with them paying me back for power/water (3/4 of the bill).  It is my fear that if they don't reimburse me for the power, that I will be left holding the bag. Is there a section I can add to the lease that will protect be and allow me to evict the tenant if they do not reimburse me for the power?