I have similar experience to thriftydutch. We have a 1996 RT with 94,000 miles. Bought it 3 years ago with 46,000 miles on it, but 17 years old. I knew it would need brakes, tires, shocks, idler arm, 4 wheel alignment but everything else was great. No rust but paint a little old. I allowed about $3500 for bringing it up to like "new drive train" and able to travel anywhere without worry. Went a little over budget ($4300 total) We travel 6 - 7 months a year, so for that time it is a daily driver. I runs great...18.5 Mile/Imp gal...has been flawless for three years. Hope to run for 4 or 5 more. I drool over the newer ones but I have less than 20% of the price invested in this one, but go all the same places the new ones go, with the same features, and just as comfortable as my friends 2013 RT.
If you can find a GOOD used one for a reasonable price, and mechanically sound, it should last for several years, even if it is used a a daily driver(which does reduce life expectancy) but should still be good for 200,000 miles +.
Good luck.
2011 Roadtrek 190 Versatile
1996 Roadtrek 190 Popular
1990 Dodge 2500 conversion
1982 Dodge 1500 conversion