Joseph,
It's more than just the use of the slide out and the negative points associated with it's use. People like me.....
- want a dinette instead of a couch
- don't want a huge box inside the house
- want a lot more upper cabinet storage
- don't want to carry an extra 500 pounds
- want a more solid house structure
- want the roof stronger to better support the a/c unit
- don't want the extra source for road noise and air leakage
- don't want to pay the extra ~$5000 for something that detracts from our RVing experience.
On this past trip, our E350 chassis died while driving on Interstate 90 which required a tow. I have skid wheels on the rear hitch. While being carefully pulled up the tow truck ramp, at one point the rear axle slowly lowered away from the chassis, though never got suspended in the air. This meant the weight slowly transferred to the PC-added frame extension and throughout the house. Nothing went wrong, no strange noises, no split seams, no concerns. But I wonder what would have happened if our PC had a massive slide out hole in the wall along with an extra 500 pounds in the worst possible place, amplifying the concern and condition.
The mechanical failure turned out to be the E350 fuel pump control module, a $150 part with an electrical connector on it, mounted on the frame between the fuel tank and engine. This is the bad module and the carton of the new one.