<prompt> Human: I brother say its better to buy a house right now, no money down and pay PMI on a 30 year mortgage than to save up the 20 no PMI and get the overall interest savings from a 15 year. Who is closer to right? Im biased cuz Im the dummy that got a 30 year no money down in 2008! She wants a house but is an under the mattress saver! She makes great money for where we live 60k and doesnt have a lot of other debt. And I want her to be in her own home, so shes HAPPY. She works her butt off too  <response>: The entire debate hinges on what happens over the course of the loans life. If interest rates and values spike, you win. If both stay low, she wins.The middle way is to save enough to pay for PMI lump-sum... the internal interest on that policy is usually 10 