I plan on buying an old motorhome next year and was figuring the same thing. Lighten up anywhere where I can but I'm not going to be just after FE I want to make the ride smoother as well and not be the guy holding up traffic on everyhill. A SLEEPERhome??
I want to go with a bus as well like Big Dave is recommending but my wife wants nothing to do with it
I think it would be the best possible ride with the most possiblities as far as FE, space & power