I spoke with Stuart earlier re: the 2350 on the Sprinter chassis.
The following is from my notes. I believe it is accurate. Hopefully Stuart will let us know if I misunderstood anything he said.
1) CCC w/o slide is ~2,000 pounds
2) CCC with slide is ~1,700 pounds
3) Slide adds ~300 pounds
4) Stuart prefers the slide -- more room, better resale value.
5) Only one slide failure in 10 years.
6) The Sprinter upcharge is still $12,000.
7) The MB Sprinter must be serviced at MB dealers.
8) The Freightliner Sprinter must go to Freightliner.
9) 2009 was the last year for the diesel E-350/450 and it did not have an intercooler so it was less powerful.
10) Ford diesel was a $10,000 upcharge.
11) Stuart bought 50 2008 Sprinter chassis from Monaco for 1/2 price.
12) 2010 was first model year for PC 2350/2400 on the Sprinter.
13) Since the original 50 Sprinters were sold, 10 have been traded in, mostly for 'lack of power'.
14) It is possible to get the tub base shower in the 2350.
15) Sofa/bed w/air mattress has been discontinued. Split electric sofa/bed is used in Ford-based rigs, older style electric sofa in the Sprinter-based units. Both sofas have cushions with memory foam.
16) Stuart clearly prefers the Ford chassis over the Sprinter.
WRT mileage, he said that the Born Free rigs are heavier and less aerodynamic which explains their lower mileage (the 9.65 mpg @ 55 mph that Born Free publishes in their brochures).
Stuart said the PC E-350-based rigs get 10-12 mpg, the E-450 rigs 8-10 mpg, and the Sprinter-based 2350/2400 16 to 18 mpg. He pointed out that it would take 300K to 400K miles of driving to get back the additional $12,000 upcharge with lower fuel costs. That sounded a bit high so I did some quick math using his numbers (low end for both):
100,000 miles at 10 mpg = 10,000 gallons x $4/gallon = $40,000 for gasoline.
100,000 miles at 16 mpg = 6,250 gallons x $4.40/gallon = $27,500 for diesel.
Better than 300-400,000 miles, but still a long payback time -- several years for most people. Of course, if/when fuel prices go up, the payback time will be less.
Also, as I mentioned above, there are many differences between the two chassis aside from their mileage ratings.
The fact that MB Sprinters must go to MB dealers and Freightliner to Freightliner bothers me. I'm guessing there are more MB dealers but it would be nice to be able to use both. Perhaps Stuart meant while they are under warranty, because I know I've read that Sprinter-based RV owners have gone to either, regardless of which badge is on the grill.
In any case, it looks like the 2350 on the Sprinter will work for us, I just need to decide whether we should wait and try to find one used or buy new. I'm thinking I'll hold off a while longer and see what's available used.