if the lease is going to be on a short-term arrangement, or if it’s unknown when the family member will move-out,  month-to-month tenancy is better. unless there is a separate meter for the family member’s unit there will have to be a percentage of the expenses to be paid. document the full name of the family member who shall rent part or all of a property from the landlord. the landlord and family member will need to agree on how much access the family membertenant will be granted to the remainder of the premises or property. naturally, in addition to the areas that are reserved for the family member’s use, there will be sections of the property the family member should expect to share with the landlord.