What ute should I buy?

I currently have a 2007 Ford Ranger dual-cab. It’s done 181,000 km and I use it for my lawn mowing business and family at the weekends. I need to replace it, my mechanic and another mechanic I work for both recommend getting a petrol model, as most of my driving is stop/start with an occasional long distance trip.

What would you recommend? Petrol or diesel? A cheap Great Wall or a more expensive brand?