EarthRoamer is no stranger to building high-end, custom, off-road RVs. The Colorado-based company has been building them since 1998. Their main model, the XV-LT, is built using the Ford F-550 Super Duty platform. It’s a go-anywhere rig designed for off-the-grid living. Well, now the company is building something even bigger – the XV-HD. It’s based on the massive Ford F-750 medium-duty truck and is converted to 4WD with a solid front axle. The fiberglass body is one large piece with no seam, and the interior is fully customizable and built to suit each owner. Obviously, something like this won’t be cheap – and it’s not. It carries a price tag of $1.7 million.