Make sure every contingency is in writing in a rental Contract and for that, it is worth the expense of hiring an attorney.  Get all renters/Lessee's vital statistics.  If you do need to proceed on an eviction action, an attorney is worth the investment.   Though my jurisdiction has mediators in some of the local Courts, I see Landlords walking into Court, misunderstanding the law and waiving their rights.  There are strict statutes on self-help and Landlords can find themselves in deep water with the Court if they do not adhere to guidelines.