I had cheap rotors warp on an E-350 under light-duty usage conditions.
In the ‘90s? I had a set that did that on my Silverado back then. Just had them turned. Then replaced them later.
New brakes , ball joint and shocks on 2003 class 1 rv just set me back $8000. Shop said they were Volvo. Not easy to find. Tires run $1000 per tire. But I sure like the pot holed open road. Addiction maybe.