Just note that Scranton itself has more regulations to deal with and the taxes are higher (both property tax and also realty transfer tax). 

@Keith Ravenel  We don't like to deal with HOAs either, regulations can be flippant.

And you might want to check with a regular real estate (not necessarily eviction specialist) attorney to make sure that your activities and approach are generally complying with the law, e.g. the RI Mortgage Foreclosure Consultant Regulation.

There are very clear cut definitions provided in the code and regulation on each of these, but the simple examples above are a good way to think of it.

But if that just is not in the cards, then you need to figure out first what (if/any) STR regulations come into play as you go to that size, as some areas would end up classifying that as commercial in nature and you might have other things to manage with respect to that. 

Did regulations change?

La Quinta just put a 90 day moratorium on new STR permits, so expect some tightening of regulations.

Any restrictions regulations?

They regularly increase regulations, making it harder and harder to be a Landlord.

@Richard Jeffries The only way to venture into the Nashville STR market with the amount of regulation in place right now is to buy a property in commercial zoning.