Hi 684619, Welcome to the wonderful world of the Qubist/Fiorinoist......great little cars/vans.
As per tyres, it seems to come down to the norm, tyre pressure, driving style, speed humps, and tracking........I've killed a cheap front set in under 10,000 mile. Now I have expensive Michelins and they are going the distance......at the moment about 17,000 and stacks of wear left on them.
The only other item which can cause tyre wear, and is a known Qubo/Fiorino fault is the top suspension mounts, which are prone to failure.
Cheers Qube O.