I have been the owner of a 1975 Newell 35-footer since about 2003. It had been used by a hospital in Phoenix as a portable medical office/bloodmobile prior to my purchase. I have converted it to a mobile office for working on oil and gas locations. I has one bunk in the rear, and a large work table has been installed in the salon for computers, etc.
A wonderful vehicle, three a/c's, three suburban furnaces, plus cat and electric heaters, so a true all climate vehicle. Cat 1160, Allison 6-speed automatic. Not fast but gets 10 mpg.
Would be interested to hear from other owners of this vintage.