Most people building an overlanding rig buy one thing at a time. A rack here, a tent there, some recovery gear when they see it on sale. By the time you add it all up — if you ever actually add it all up — the number is a lot bigger than you thought you were spending. I’m going to walk through my Sierra build with real numbers, because I think the community does new people a disservice by never actually doing this honestly. The Foundation: The Truck I paid well over $50,000 for my 2025 GMC