I was really interested in the new diesel sprinter type class b's because of the high fuel efficiency, approx. 22 mpg - great stuff. Did some figuring. Assuming gas costs $1.80/gal. and you get 15 mpg and a diesel gets 22 mpg at $1.60/gal, and the cost differential to purchase is $3500 (I own a fleet of trucks,some gas and some diesel and the purchase premium is approx. $3500), then figure the cost of money delta ($3500 x 8% paid over 5 years) and you find that the breakeven point for the luxury of a 22 mpg rv is approx. 150,000 miles. However diesel drivetrains last forever if properly maintained, but the coach and axles will probably fall off by then. But the good news is that you get to fill up your propane tank every day to run the generator for 10 hours so that you can survive the Texas heat while traveling. Just an observation and something to think about.