B and C said:Tell the mechanic your concerns on rust and what repairs to whatever he finds would cost. These are negotiation tools. I would think in the rust belt that maybe since it's a class B and bought in AZ that it wasn't used for winter driving up there.
The worst than can happen is you go back without a van.
That's a pretty significant risk. I suppose I DO have to consider that. I need to consider if the brakes work properly so I don't demolish the RV in a wreck. I need to consider the axle is aligned properly or the wheel so it doesn't cause the brakes to fail, etc... Same thing with any system on the vehicle that would cause a wreck or explosion or fire that would total the vehicle. Since (I'm guessing) it's probably not practical to check everything on vehicle head to toe for these types of issues, which issues would more pressing than the others. (considering totaling the vehicle)
I have had to worry about mold enough in a humid climate, I don't want to worry about that in a van. Do people ever pay for a mold or air quality control test in a RV, or is that just overkill? and a leak will be easily spotted?