it just depends how big your tank is and if you have a helper.i have a transit connect T230(900kg payload)and a 500L tank and frame,reel,hose,leisure battery,pump,poles,trad gear/ladders etc and me.full to the brim in the morning i reckon im just under.obviously it gets lighter as the day goes on.
for a sole trader this set up is ideal IMO but if your planning on a bigger tank and a helper then you need a bigger van(transit/vivaro size)