Lancaster, PA has lots of family friendly things to do. I believe Hershey park and dutchwonderland have a kosher concession stand and they let you in just for food.
Baltimore/ Washington area
If you are relying on the basement rent to pay your mortgage just keep in mind the market changes and the demand. One month with out a tenant can set you back. As well as having to lower the rent according to market. Plus dealing with tenants is not always a picnic.