Being a numbers guy, I was always calculating how much I needed to pay monthly once I bought my dream house. I remember a year ago when my wife and I almost bought a house, I was using my pen and paper to write down all the necessary expenses like property taxes, home owners insurance. As a result, I gave my readers an option to calculate all this in an electronic form up at the top of the page. Fast forward a year from now. I still havenât bought my house, so the need for a mortgage calculato