With BA there are no dedicated 4x4 Mechanics for want of a better word in a mobile platform.
I can actually seeing this kicking on and franchised out. Find a reliable source for parts {Gary @ Nizzbits}
Approach some fuel depots for fluids, Turn a GU or GQ into a trailer not hard to do, Logo and away you go.
Set a limit on distance travelled before a surcharge applies.
That's if you like working on other ppls 4x4.
I used to work for Honda in Alice But got sick of ppl saying
Fix my bike but don't spend more than $100.
Then you get non paying ppl, shite I'm talking myself out of it.
But you know what I mean