Thread: 6x6 Truck vs 6x4 Truck - school me

I'm looking at options for a new Cone Penetration Testing rig for work. (CPT = think drill rig but static push rather than rotary drilling)
I'll need to get 4 hydraulic rams fitted to level the whole vehicle and get the wheels off the ground. That's an engineering and cert problem then can be fixed by throwing money at it.


Best case I'd get a 6x6 truck and stick the pushing gear on the back. Would look something like this:




HOWEVER...
In NZ 6x6 trucks are between expensive and stupidly expensive.
Most testing is green fields (paddock) or places a building has been. Would be able to drive a 4x4 ute there kind of thing.


If I went down the option of a 6x4 truck what do I need to look for/avoid?