Well we got 2 pains in the a** Sprinters too. 2008 & '13. Service for us in a metropolitan area of 1 million+ is 40 some miles away. The Freightliner dealer is actually the better & cheaper of the 2 for warranty and non-warranty work in my experience. Definitely for parts if needed.
To 2112 the OP, stick with the pre 2007 T1N 5cyl chassis if you can find the right one, but watch out for rust issues. The 2007 on up V6 is a good engine, but the emissions equipment on them causes all kinds of issues, LHM's, (limp home mode), and compared to the domestic vans, they are extremely complex in their engineering and expensive to repair out of warranty. But that may never rear it's ugly head either.
The 2007's on up do drive wonderful and are very comfortable after you get the seat adjusted correctly. The climate control system is very non intuitive on them also, but can be figured out, if they are working correctly, which neither of ours were initially.
Rust issues are starting to show up on the newer 2007+ NCV3 Sprinters, which in this day and age is silly for that new of a vehicle. (Don't get me started about the body fits and finish on our '13 van)
The '13 will be our last Sprinter RV if/when we ever go for a new one