Hands down, the biggest barrier to being a homeowners is saving up for a down payment (though this isn’t necessary a bad thing ’cause you should be putting at least 20% down. Letting people buy with zero down was one of many things that got us into this mess of a housing crisis). This especially rang true for Millennials (18-34 year olds) – 62% said this was among the biggest hurdles that they faced in trying to buy a home.