The PDI is your only defense. A slow thorough PDI is the most effective way to hopefully have a decent RV experience.
Unfortunately most do not conduct a thorough PDI and suffer the consequences down the road when they eventually discover issues that could have been caught during the PDI. Most do not understand the importance and necessity of the PDI
You next line of defense is the dealer. Is the dealer competent? Are they on your side once money has exchanged hands? Will the dealer stand behind your warranty claim and go to bat for your or will they hang you out to dry?
A 2 year warranty is always better than a 1 year.
Lastly how good is the factory support.
It's reassuring to know the factory will take a unit back and make it right. However if your unit needs to go back for repairs you are already well into a RV'ing nightmare.
Most importantly the RV industry is somewhat shady and unscrupulous with lots of little secrets. They are not as above board as the auto industry. Most consumers do not initially realise how treacherous the RV industry is until it's too late.
By the 2nd purchase the consumer has wised up and is up for the challenge
19'Duramax w/hips, 2022 Alliance Paradigm 390MP >BD3,r,22" Blackstone
r,RV760 w/BC20,Glow Steps, Enduraplas25,Pedego
BakFlip,RVLock,Prog.50A surge ,Hughes autoformer
Porta Bote 8.0 Nissan, Sailun S637