I wish I had some photos of some of my old work trucks. If they didn't have at least 20,000 hours on the clock, we didn't own it. You would be suprised how much you can hold together with duck tape and cable ties.
The best were the rust patches on the rocker pannels. They consisted of duck tape over the holes with tigerhare overtop. The ducktape usually stuck to the body long enough to pass inspection, and after about 3-4 weeks, it fell off, and you had your air conditioning back.