Mike,

Just my two cents worth:

37K for a water pump is probably average, I had mine replaced at 45K.

4 new tires, brakes and exhaust at 37K? I would suspect how the previous
owner drove his van.  I've rode with people who I would be surprised if
the would even get that much mileage before such replacements.
Personally I tend to baby my camper, No jackrabbit starts, waiting for
the last minute then slamming the brakes, etc.  I got 75K on my front
pads, and 60K on the original Continental tires. (I also rotate the
tires every six months and swap in snow tires in the rear.). 

Tim Fast
fastth@phibred.com

88 Westy (The Battle Bus)