Definitely a dually. SRW are usually a hard find anyways (at least in my neck of the woods)
My 7.3 never treated me bad. Then again neither did my Chevy 350 gasser. 7.3 WAAY better fuel economy. I never really calculated MPG on either but I drove them equal distances and spent $60/day in the gas Chevy and $35/day in the Ford 7.3
I'm 6' tall and fit fine (2" to spare) in Bluebird MicroBirds. The Collins, Thomas, USBus all too short for me.
I'd say bigger the better. 5 windows (at least!) They're quite maneuverable, I can park all the same places I park my Chevy Suburban. The van nose makes all the difference. Like driving the Isuzu cabovers that are all over 'Stralia

A buddy of mine's parents came here from down under. Ended up buying a ranch in Texas. Apparently Texas is to Australia as Florida is to New Englanders I'm told...
Sent from my E6883 using Tapatalk