BOISE, Idaho — Homebuyers in Idaho might have to shell out more money because of President Donald Trump’s tariffs. “I’m born and raised in [the Treasure Valley], and my wife and I bought our first home here, said Steve Martinez, Tradewinds General Contracting owner. “I expect our kids to be able to buy their first home here. The way things are going, that affordability just keeps getting further and further out of reach.” …Martinez, who is stocking up on lumber, said the timing “couldn’t be any worse.” The U.S. has historically relied on Canada for building materials. …Steven Peterson, University of Idaho economics, called the tariffs an “interesting experiment” with a lot of unknowns that will impact virtually every industry and service. …It is not just lumber that builders are worried about.