Gordon, I will second your opinion on services for a four wheel drive rig. I turned my Father in law onto a 3/4 ton 75 Ford 4X4 pickup in 1980 for a grand in total price. It came with 2 brand new sets of tires, 39000 miles on the odometer, and had been sitting in a garage for the previous 1.5 years. The owners grandson got it stuck in a creek and left it overnight thinking he would have a local pull it out with a cat in the morning. Well, when they showed up, the top 6" of the cab was showing above the water, which had risen approximately 5 feet overnight.
I got the dubious honor of stripping it down, and rebuilding it. There was water/silt in the engine cylinders, front and rear differentials, axles, fuel tanks, filters, and everyplace imaginable. Total cost of repairs? $800. That was for seals, fluids, gasquet sets, etc. No labor, I worked cheap.
He drove it up until 4 months ago when he moved back to San Diego and sold it. Biggest benefitial tool was a pressure washer!