I also own an older “Coachmen” motor home, and not only is it more reliable, it is much more straightforward to repair when something does fail...... Well, other than a pesky roof leak that took even my professional roofer buddy several times to figure out and fix.
We bought a 2017 Coleman Lantern trailer 2 years ago. We found out fast that at the 5 year mark you have to start replacing everything. So far we have put a new thermostat in the fridge, new carbon monoxide detector, new microwave, new electric converter, new (quiet) water pump and flex sealed the roof. This next week Mr. GG2 is going up to replace the valve in the toilet which is leaking. We are praying the awning lasts 2-3 more months so we don’t have to change it out in 95 degree weather. After that I think we’re good to go for awhile. 😉