My wife and I would like to buy another house which would be our ppor and our current house would become a rental. We haven't had the current house valued yet but might have 30-40k of equity. If we wanted to buy nowish we would have to use that equity. We are both on approx 50k a year. How much would we miss out on in deductablity by using that equity purchasing a ppor, rather than using it for investment?