USE SELDOM, RENT OFTEN
When personal use is greater than 10 percent of the number of days it is rented to others at fair market value, your vacation home is treated as a residence. The tax rules in this area are complex.
You can deduct rental expenses up to the level of rental income. But you can't deduct losses.
The Internal Revenue Service has detailed tax rules governing vacation properties.
Personal Use of Dwelling Unit (Including Vacation Home)
http://www.irs.gov/publications/p527/ch05.html
