Sorry to hear about your troubles. I found nearly every coolant clamp on my freightliner was loose. After tightening them I have not had a problem with the engine or chassis. Knock on wood, thank God.
The coach is a completely different story. The paint issues, slides, cab separation, etc. are all common and unfortunately, I have had every known to man/this forum, go wrong with my unit. Each trip we find something else major wrong with it. Constant trips back and forth to our local Camping World have resulted in hair loss, weight gain, and high blood pressure, lol. I gave up and am driving 800 miles back to NIRV to leave it with them for the winter to fix the 18 of 32 remaining documented issues.
2022 Jayco Seneca 37M
Toads depending on trip
2021 Jeep Wrangler Rubicon
2021 Jeep Grand Cherokee L