http://videotap.wistia.com/medias/lxybpoyq0k?embedType=async&videoFoam=true&videoWidth=640 As you’ll see in the video, a lower interest rate allows you to borrow more money than a high rate with the some monthly payment. Interest rates can fluctuate as you shop for a loan so ask lenders if they offer a rate "lock-in" which guarantees a specific interest rate for a certain period of...