Yes, but...
The refinance of your personal property to raise money for investment property will only be deductible as an expense on the business property so long as you maintain an absolutely clear paper trail/money trail between the refinance and the investment property. You will need to show, if audited, that your costs were purely related to your business income. As soon as you start mixing up the money (such as, using part of the refinance to pay personal bills, buy a car, take a vacation, etc.) then it becomes more difficult to determine what part of the cost is a legitimate business expense and the deduction will be at risk if you are audited
