I have a 1997 Coachman Catalina 22RK that I bought in 2008. It had 32,000 miles on it and 134 or so hours on the generator. It has been fine with no issues. Mine has the V10 and the only issue I've had with that was the torque convertor going bad at 40 something thousand miles.
If you're looking for more specific information, you should add what model/size Leprechaun you're looking at.
2014 Itasca Spirit 31K Class C
2016 Mazda CX5 on Acme tow dolly- 4 trips ~ 5,800 mi
Now 2017 RWD F150 with a drive shaft disconnect