Make sure the house and location make a good rental.
Your idea of the perfect vacation may mean going to a place with no television, no cellphone and no sight of your neighbor's fence. But that's generally not what people who rent vacation homes want. If you're really going to work to rent out the property, make sure it's well suited for vacationers.
You need to be on the beach. Not near the beach. You need a house with lots of cots and sleeper sofas so it can bed down as large a group as possible.
Ideally, the home will be in the thick of things. Keep in mind that not all people enjoy tracing their way through winding roads. Think of your vacationer as someone who wants to find the house, park the car and never get in the car again for the entire week or weekend. They want to walk to the beach, walk to the store and walk to the trailhead.
These types of properties generally cost more, but they make better rentals.