Looking at buying an 04 volvo 780 d12 motor (465 hp / 1650 tq) with a 13 speed trans for $12,500. It has 1.1 million miles and has recently had egr, starter, boost sensor, fuel pressure regulator, and full tune up. The paint has some clear coat problems. It's titled as an Rv but still has a commercial style hitch which I would need to change. I would want to add a bed to it and want to keep the dual axles. From what I've read the d12 motor is pretty solid besides egr valves. I don't have a problem working on my equipment but don't want to jump into anything that I'll regret. I'll be pulling about 16k right now but after adding a bed to put a jeep on will probably be getting a 20k 5th wheel. Thanks for any advice.