Since getting rid of my old class A Seabreeze I33 on a 460 Ford, I have had no breakdown problems. No fuel pump (in the tank) failures, no transmission rebuilds (total of three trans in 34000 mi), no Dana rear end failures, and no power (until I put on a full Banks). All the while towing a Suzuki Samuri or Jeep Wrangler. And I dealt with this problem for 9+ years!
2002 Fleetwood Expedition 34M, 300 Cummins w/Allison 6sp. The chassis, engine, trans...Outstanding. Fleetwood...very iffy quality control, but good concepts.
The best way to avoid breakdowns... new tires every 5 to 6 years regardless of mileage!!!