I believe the overflow came out of the washing machine drain (first noticed there by the tenant), but I don't think that rules out the kitchen sink as the source. 

Take notice....One of my favorite sayings came from a favorite Civil War General - "never take counsel of your fears" ...John Jackson

Tenants don't notice things because they don't want their rent to go up.

I would lay it out to your tenants that you are only giving  a 6 month extension or let them go month to month and give notice in advance of when you want to put it on the market. 

@Chris Carrigan Do you notice any home warranty companies operating in the Raleigh metro area being popular with your buyers?

I understand that a typical rental analysis takes the monthly rental amount, sets aside 5% for vacancies, estimates 50% for expenses, and then makes sure the remaining 45% pays debt service and leaves a profit.But I've noticed that mortgage calculators often include insurance and tax payments in their monthly mortgage payment estimates.

What I have noticed is that I am able to connect with a seller as best I can and that allows me to ask sometimes tricky questions.

@Dean Klein The lease termination is actually how much notice you need to give prior to the end of the lease agreement.

You have to issue notice to enter according to your state law and go in...deliver a month worth of notices at the same time, change the locks so you have access, and get done whatever you need to...you can work every day...we install a permanent lockbox with keys at every property after we change the locks...no barriers to entry for contractors...I see this a lot where people work around their tenants....if you lose control things will go downhill rapidly.

Ive google PA and noticed that a real license is required for "property management".