There are a few Leyland DROPS in civvy life, but expensive to run both on fuel and tyres. Then you have an expensive drivetrain with a complicated Allison auto gearbox. Or you could go into the civillion market for a 3 or 4 axle beaver tail, slide back body, or hook loader. all available with manual or auto boxes, some more complicated than the Allison. They do not have the offroad capabillitys of the DROPS though. You could if you were not looking for long distance driving go for an agricultural Fast Track and low trailer. That would give you off road capability. With all of the options there are spares availability, drivers license and operators license implications to check into, as well as the cost of insurance for the different options. There is a Scammell with a converted Dyson trailer for sale on Milweb at the minute. Slow and steady but looks the part.