"I bought all the plumbing tools to take care of this." Why did you not take care of this before the tenant moved in as you say, you had all the tools? You knew of the problem and did nothing until tenant took action to solve you problem! (my brother in law, who was NOT authorized to rent it!) Who signed the lease for this tenant? Your brother in law was acting as your agent it seems in renting the place, as he had access to show it to tenant. You are slow in responding to repairs and have no control over your property as your brother in law has access to rent it. Where do you fit in this picture?