If you use your vacation rental for 3 days (<14 day and 10%) and you meet requirement to split costs to deduct on schedule E, can you take the difference in interest off your schedule A? 

Example, 3 personal days and 40 rental days.  Because of personal use I report only 93% of expenses against rental income on schedule E. I assume I can report the 7% of interest on my schedule A, but I wanted to check if that is true since IRS considers < 14 days investment property vs vacation (or second) home.