14 days is all we would need to do it, two 1 week vacations. Our dates would not matter when we vacation so I would think being flexible like that all you would need to do is find a renter,then your vacation dates would be when they want to stay at your place.
Another benefit is you can rent your home up to 14 days tax free.
This is quite common I'd say, and I'd go for it. You can set the minimum stay to 6-7 nights on your listing.
What are the liabilitys with this, say some one fell down the steps and got hurt? Or if the renters destroy your place with a party, would be remidied in civil courts?