You want a minimum of a 290 minimum!!!!!
That will give you around 1000-1100 payload depending on spec swb vs lwb vs high top etc etc.
i have the 310 which is 1304kg payload.
If you go for the newer models the engine is lighter and the payloads are more somewhere between 50 and 100 kg.
So you get a 300 320 340.
330 or 340 give you 1500-1600kg payload!
270 is the one you have mentioned (cheapest)
290 or 310 trend is a good van. I know you aint bothered about spec but the price difference was a £1000. When you get things like front and rear parking sensors, folding mirrors, cruise control, stereo control on steering wheel, heated mirrors and front window etc etc It makes you think
We sorted out a limited connect this year and was lovely to drive 1000kg payload as well!
I wish i went for a limted but i will sell mine and get a sport or if Msport will build it a 340 swb