Some really great advice up there, by Mike Hill.
I would add:
A Mog is where you might go, once you've outgrown a serious Land-rover/tractor-using habit, rather than a transit habit?
Transit with rear mud-tyres do take some beating..
Mogs can be lots of fun -and headaches too.
I reckon ours is worth the same as when we bought it, ex German Authority, 20+ years ago (via a well known N Yorks specialist)..
There are a few independent/travelling freelance Mog specialist fitters, that might be useful to you..
If we were busier, then personally I'd be looking at an older Fastrack myself -but only because my neighbours rate/use them, and the maim-dealer (and an additional good breaker, too) is a mile away, in South M/c.
A 4WD Trantor would be fun too, but much like hens teeth!