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. 

@Scott Calafiore,MLS data below shows signs of a cooling w. the decrease in % of selling price vs list price.

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".

Rodrigues Definitely noticing that rent increase starting up, maybe by December rents will be closer to the 1% rule if home prices simmer down even more.

@Ishmael JohnsonGenerally, your lease agreement should specify how late rent notices will be sent.

Here in Georgia it's typically a 3 day notice to Pay or Quit then a trip to the Clerk of Court for filing.Your other option is to terminate this tenancy at will since there is no written lease in place.