I'd also throw in that aside from DPF issues, fuelling a diesel is going to be more expensive if you're only doing short runs too. You need to do fair miles for the fuel economy to counteract the increase in the diesel price over petrol.
At 5 miles a day the engine isn't really up to temperature until you've finished your journey. In that tie you won't be getting decent economy figures associated with diesel so I'd pass if I was you.