If it was me I would keep searching for the perfect truck. After two years of searching we found an 08 GMC Sierra 3500 D/A with 102000 miles and looked like new. We paid $26000 and had to drive several hours away to pick it up. My son is 14 and 6'1" and is comfortable in the back seat.
With a Class A you'll either have to have a toad or rent a car at your destinations. The wife and I looked at changing to a class A but can't justify two engines to maintain even though they appear to much more comfortable while traveling.
Good luck with your journey and have fun.
